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Moebius Hudson Rough Surface

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  • Member since
    May 2017
Moebius Hudson Rough Surface
Posted by Papajohn on Thursday, March 12, 2020 1:08 PM

I picked up the Moebius '54 Hudson Hornet Club Coupe Kit at a recent model show/ swap meet and upon removing the body from the sealed bag, noticed a really rough molding surface:

Questions:

1. Has anyone else encountered this surface or other Moebius kits? I have another 4 Moebius kits ('65 Plymouth's) and have built one of the '55 Chrysler 300's all which had highly polished body surfaces.

2. If so, have you been able to get a decent gloss surface after priming, painting and clear coating without doing any surface sanding or or mods?

3. If you did mod the surface to address this roughness, how did you do it without obliterating the engraved detail?

Wondering now if this is the reason this kit was such a deal.....

thanks!, John

  • Member since
    January 2017
Posted by 195X on Thursday, March 12, 2020 1:44 PM

That looks like a poor resin cast or worse, an early 3d print. Never seen this before in any kit.

My favorite color is clear. I am also ambidexterous, I can screw up equally well with either hand. I am 53 years old and been building for most of that time. :)

On the bench... somewhere. Pink Panther show car, 1978 Dodge Magnum Charger Daytona Midnight edition SE 300. Mongrel T.

  • Member since
    May 2017
Posted by Papajohn on Thursday, March 12, 2020 2:45 PM

Thanks for feedback 159X. I'm sure this is injection molded polystyrene, not a urethane casting or 3D printed/ stereolithography. I worked with injection molded thermoplastics for +40 years before retiring and never saw anything like this Moebius body, almost like the mold cavity surface was glass bead blasted with really course beads or other abrasives. The inside surfaces of this body are glossy (other than typical tool marks here/ there on the core) so I don't think it's due to molding parameters, excessive/ inadequate mold release or contaminated resin. I gotta believe this rough surface is in the mold cavity. 

I've ordered the Moebius '54 Hudson Hornet Special (fastback), will be interesting to see what the surface finish on that body looks like. I'll try to  smooth out the surface on coupe body and go ahead with primer. If it's still rough, maybe I'll do a beat-up weathered junkyard build?

  • Member since
    May 2017
Posted by Papajohn on Thursday, March 12, 2020 3:04 PM

Found an eBay review for Moebius's '69-'72 Ford trucks that also mentions really rough surfaces on bodies:

I suspect Moebius has had to bead blast some of their mold cavities on these complex car body molds due to parts sticking within the cavities (or side pulls?) during ejection, molded parts generally should adhere to the cores from which they are ejected.

Please forgive my techno weenie comments, hoping to hear from other modelers who have encountered this problem and how they overcome it to achieve a glossy final painted finish with all engraved detail intact. 

  • Member since
    January 2017
Posted by 195X on Thursday, March 12, 2020 4:05 PM

That could be what caused all the issues at Moebius. I'll be holding off buying any, simply because I just don't have time for that brand of nonsense. I had heard, they'd been bought. Any chance the new owners did this?

My favorite color is clear. I am also ambidexterous, I can screw up equally well with either hand. I am 53 years old and been building for most of that time. :)

On the bench... somewhere. Pink Panther show car, 1978 Dodge Magnum Charger Daytona Midnight edition SE 300. Mongrel T.

  • Member since
    November 2003
  • From: East Bethel, Mn
Posted by midnightprowler on Thursday, March 12, 2020 5:37 PM

A good coat of Duplicolor primer will cover that just fine.

1 Corinthians 15:51-54
1 Thessalonians 4:13-18

Ask me about Speedway Decals

  • Member since
    May 2017
Posted by Papajohn on Friday, March 13, 2020 1:00 AM

Thank you all for the responses. I forgot to mention that all of the molded parts on the runners exhibited quite a bit of mold release residue, more than I have ever seen on any other plastic kit I've opened. I think Moebius must have had a real problem with all these parts sticking in the molds which might also be a factor for the rough surface on the body.

After soaking all the parts in water/ detergent to remove the mold release, I wet sanded the body and hood using 1000 grit sandpaper which really helped remove most of the roughness without damaging the engraved detail. Tamiya primer should help highlight any remaining roughness that I need to address.

  • Member since
    August 2005
  • From: Nashua, New Hampshire
Posted by mrmike on Friday, March 13, 2020 8:25 AM

Moebius was having an issue with the pebbled surfaces on their Hudson and maybe some of the Ford pickup model kits.  Contact Moebius and they might replace the body wiith a new smooth surface body.  

"That's Spenser with an 'S' like the poet."

Robert Urich Spenser For Hire 1985

Classic Plastic Model Club

  • Member since
    May 2017
Posted by Papajohn on Friday, March 13, 2020 10:01 PM

Good suggestion Mike, thanks. If the surface doesn't improve after primer and base coat, I will give that a try.

John

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