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Difficulty with Dupli-Color clear coat

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  • Member since
    December 2019
Difficulty with Dupli-Color clear coat
Posted by amt68 on Saturday, May 23, 2020 6:36 PM

When using Dupli-Color clear coat finish I'm not able to acheive a smooth finish that only needs a mild polishing compound as the can states. Success is only acheived by a great deal of wet sanding (hours) to smooth the surface followed by a polishing compound. Below is a picture of a '69 GTO I'm currently working on that shows smoothly polished roof (which looks even better than the picture shows)  and the untouched rough trunk section. I applied the clear (in mild temps and relative humidity) with multiple mist coats and a final heavier one. It appears smooth after the final coat but dries with an orange peeled appearance. As I'm wet sanding the finish I notice what appears to be pin holes in the surface before it's smoothed out. When it's done the finish looks great but it should be accomplished with much greater ease. Using Testors Gloss Cote I get a fairly smooth finish with only mild polishing. The Dupli-Color however is more durable and holds up better to polishing with products like Meguiars Scratch-X. Anyway not sure what I'm doing incorrectly as I know many modelers use Dupli-Color successfully. 

 

  • Member since
    April 2020
Posted by 58volvoV8 on Sunday, May 24, 2020 12:36 AM

I just sprayed my 65 chevelle wagon last week in duplicolor GM light blue metallic and clear....what I did was spray it out side on a sunny day held the body up high and looked down the side as I sprayed adjusting my stroke speed to were it was laying on smooth....these cans sorta mist out so if you go to fast you will build a sandy texture up....hope that helps. Also I soak my cans in warm water first...i fill the sink with straight hot tap water then add in a bit of cold to get like a "warm bath" temperature.

  • Member since
    May 2015
Posted by Goofy62 on Sunday, May 24, 2020 1:11 AM

I use Duplicolor clear on every build and have found that each successive coat will be a little smoother than the prior and I use wet coats each time.

Part of the issue could be the mist coats.

My question would be, what paint are you spraying it over, are the color coats smooth before beginning clear coats, and exactly which Duplicolor clear are you using?

There are more that one choice.

 

 

 

Steve

 

  • Member since
    May 2015
Posted by Goofy62 on Sunday, May 24, 2020 1:13 AM

58volvoV8

I just sprayed my 65 chevelle wagon last week in duplicolor GM light blue metallic and clear....what I did was spray it out side on a sunny day held the body up high and looked down the side as I sprayed adjusting my stroke speed to were it was laying on smooth....these cans sorta mist out so if you go to fast you will build a sandy texture up....hope that helps. Also I soak my cans in warm water first...i fill the sink with straight hot tap water then add in a bit of cold to get like a "warm bath" temperature.

 

I warm the cans as well, but I fill a sink with hot tap water, as hot as I can get it.

 

 

 

 

Steve

  • Member since
    December 2019
Posted by amt68 on Sunday, May 24, 2020 7:40 AM

58volvoV8

I just sprayed my 65 chevelle wagon last week in duplicolor GM light blue metallic and clear....what I did was spray it out side on a sunny day held the body up high and looked down the side as I sprayed adjusting my stroke speed to were it was laying on smooth....these cans sorta mist out so if you go to fast you will build a sandy texture up....hope that helps. Also I soak my cans in warm water first...i fill the sink with straight hot tap water then add in a bit of cold to get like a "warm bath" temperature.

 

 

 Thanks volvo for your suggestions. Part of what I'm doing could be the speed of my stroke since I don't want any runs in the clear. I've warmed Testors paints in the past but not any Dupli-Color cans so that is worth a shot. I'd really like to be successful with the auto lacquers given the variety and durability of the finishes. 

  • Member since
    December 2019
Posted by amt68 on Sunday, May 24, 2020 7:51 AM

Goofy62

I use Duplicolor clear on every build and have found that each successive coat will be a little smoother than the prior and I use wet coats each time.

Part of the issue could be the mist coats.

My question would be, what paint are you spraying it over, are the color coats smooth before beginning clear coats, and exactly which Duplicolor clear are you using?

There are more that one choice.

 

 

 

 

 

Steve

 

 

 

Thanks Steve for your helpful suggestions. Your question about the smoothness of the base coat brings up a point which I hadn't mentioned in my post. Sometimes the base coats go on smoothly and dull in appearance as they should. Other times (such as with this model) the base coat goes on unevenly. It's odd but it seems some of the cans I have are smooth appliers and some are not. Regardless of the base coat application I always have problems laying down a smooth coat of clear.  As for the type of the paints I use they are Dupli-Color for both the base and clear coat. They are both "Perfect Match" Acrylic Lacquers commonly found in auto parts stores. 

  • Member since
    May 2015
Posted by Goofy62 on Sunday, May 24, 2020 11:27 AM

amt68

 

 
58volvoV8

I just sprayed my 65 chevelle wagon last week in duplicolor GM light blue metallic and clear....what I did was spray it out side on a sunny day held the body up high and looked down the side as I sprayed adjusting my stroke speed to were it was laying on smooth....these cans sorta mist out so if you go to fast you will build a sandy texture up....hope that helps. Also I soak my cans in warm water first...i fill the sink with straight hot tap water then add in a bit of cold to get like a "warm bath" temperature.

 

 

 

 

 Thanks volvo for your suggestions. Part of what I'm doing could be the speed of my stroke since I don't want any runs in the clear. I've warmed Testors paints in the past but not any Dupli-Color cans so that is worth a shot. I'd really like to be successful with the auto lacquers given the variety and durability of the finishes. 

 

I would suggest forgoing the mist coats and spray each coat wet.

It's nearly impossible to get runs with these lacquers unless you're trying.

As the clear cures, it will shrink up considerably.

Often, this will leave a slightly dull appearance, but each successive coat thereafter will produce a little more shine each time.

I use as many as 5 fairly wet coats of the Duplicolor, "Protective Clear Coat" shot straight from the warmed can and almost always have good results.

It will likely always need some polishing, but I polish all of my builds regardless.

 

 

 

 

 

 

Steve

  • Member since
    December 2019
Posted by amt68 on Sunday, May 24, 2020 3:38 PM

Goofy62

 

 
amt68

 

 
58volvoV8

I just sprayed my 65 chevelle wagon last week in duplicolor GM light blue metallic and clear....what I did was spray it out side on a sunny day held the body up high and looked down the side as I sprayed adjusting my stroke speed to were it was laying on smooth....these cans sorta mist out so if you go to fast you will build a sandy texture up....hope that helps. Also I soak my cans in warm water first...i fill the sink with straight hot tap water then add in a bit of cold to get like a "warm bath" temperature.

 

 

 

 

 Thanks volvo for your suggestions. Part of what I'm doing could be the speed of my stroke since I don't want any runs in the clear. I've warmed Testors paints in the past but not any Dupli-Color cans so that is worth a shot. I'd really like to be successful with the auto lacquers given the variety and durability of the finishes. 

 

 

 

I would suggest forgoing the mist coats and spray each coat wet.

 

It's nearly impossible to get runs with these lacquers unless you're trying.

As the clear cures, it will shrink up considerably.

Often, this will leave a slightly dull appearance, but each successive coat thereafter will produce a little more shine each time.

I use as many as 5 fairly wet coats of the Duplicolor, "Protective Clear Coat" shot straight from the warmed can and almost always have good results.

It will likely always need some polishing, but I polish all of my builds regardless.

 

 

 

 

 

 

Steve

 

I'll follow your advice Steve and I agree it is always best to polish the finish. Btw that picture in your response is the same Dupli-Color clear I'm using. 

 

  • Member since
    April 2020
Posted by 58volvoV8 on Monday, May 25, 2020 12:00 AM

Goofy62

 

 
58volvoV8

I just sprayed my 65 chevelle wagon last week in duplicolor GM light blue metallic and clear....what I did was spray it out side on a sunny day held the body up high and looked down the side as I sprayed adjusting my stroke speed to were it was laying on smooth....these cans sorta mist out so if you go to fast you will build a sandy texture up....hope that helps. Also I soak my cans in warm water first...i fill the sink with straight hot tap water then add in a bit of cold to get like a "warm bath" temperature.

 

 

 

I warm the cans as well, but I fill a sink with hot tap water, as hot as I can get it.

 

 

 

 

 

Steve

 

I was warming my cans in straight hot tap water.....till I had two cans of semi gloss black die on me....a krylon the nozzle wouldn't stop spraying and I had to pull up on it and twist to stop it. And then a can of rustoleum used it several times them all of a sudden it stopped and that was it...i thought the nozzle plugged so I cleaned it to no avail......no problems with my many other cans tho..(multiple colors and brands)...but with my laquers I decided to keep the temp down a bit at 11.99 a can I didn't want to mess um up

  • Member since
    May 2015
Posted by Goofy62 on Monday, May 25, 2020 1:19 AM

58volvoV8

 

 
Goofy62

 

 
58volvoV8

I just sprayed my 65 chevelle wagon last week in duplicolor GM light blue metallic and clear....what I did was spray it out side on a sunny day held the body up high and looked down the side as I sprayed adjusting my stroke speed to were it was laying on smooth....these cans sorta mist out so if you go to fast you will build a sandy texture up....hope that helps. Also I soak my cans in warm water first...i fill the sink with straight hot tap water then add in a bit of cold to get like a "warm bath" temperature.

 

 

 

I warm the cans as well, but I fill a sink with hot tap water, as hot as I can get it.

 

 

 

 

 

Steve

 

 

 

I was warming my cans in straight hot tap water.....till I had two cans of semi gloss black die on me....a krylon the nozzle wouldn't stop spraying and I had to pull up on it and twist to stop it. And then a can of rustoleum used it several times them all of a sudden it stopped and that was it...i thought the nozzle plugged so I cleaned it to no avail......no problems with my many other cans tho..(multiple colors and brands)...but with my laquers I decided to keep the temp down a bit at 11.99 a can I didn't want to mess um up

 

 

I don't use Krylon, and have never had issues with any of the Duplicolor primers, colors or clear, but I have used some Rustoleum paints and have had nothing but trouble with the nozzles plugging up.

I don't know if it's the paint itself, or if it has more to do with the garbage nozzles, but they usually plug up on me after just a couple of uses.

 

 

 

 

 

Steve

 

 

 

 

 

  • Member since
    April 2020
Posted by 58volvoV8 on Monday, May 25, 2020 1:45 AM

could be.....they are the 2x nozzle cans...that said. I use rustoleum grey primer for all my parts(except bodies...i use testors for enamel and duplicolor for lacquer)and never had problems 

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