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The Kit Cars Forum > Kitcar Discussion Forums > Technical Discussion & Question (Moderators: AdminAri, FunnyWheels) > Preventing paint damage from mold making?
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Author Topic: Preventing paint damage from mold making?  (Read 616 times)
G-Nasty
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« on: October 07, 2002, 07:00:37 PM »
What have you used that has proven results? I dont want to trash the paint when I pull the molds from the panels-what products are the best? I will be making epoxy molds. How should I prep the paint so it is not damaged? Any tips greatly appreciated-
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« Last Edit: December 31, 1969, 05:00:00 PM by 1043298000 » Logged
G-Nasty
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« Reply #1 on: October 08, 2002, 05:22:08 PM »
I take it that paint damage will have to occur- no matter what I use (wax PVA etc. etc.) I was wanting to paint the car anthracite. Maybe I will have an excuse to after these molds are made.
I'll post some pics on damage.
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« Last Edit: December 31, 1969, 05:00:00 PM by 1043298000 » Logged
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« Reply #1 on: October 08, 2002, 05:22:08 PM »
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beerman
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« Reply #2 on: October 08, 2002, 05:52:21 PM »

I think the best choice is to call a expert fiberglass shop for this answer.There is a good chance that if you wax and apply a good pva to the part it might be ok, but to be on the safe side i would ask again an expert that has done this before. If you plan to repaint the parts anyway then , i guess you will have to decide. I hope you luck, and please let us know how it turns out.You could e-mail this guy , maybe he can help you.http://www.hotrodder.com/32Blowpar/page10.html
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VRESpeedFreak
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« Reply #3 on: October 09, 2002, 07:30:50 PM »
Just out of curiousity...unless I missed something Smiley

But, what are you making molds of?
« Last Edit: December 31, 1969, 05:00:00 PM by 1043298000 » Logged
GodAlex
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« Reply #4 on: October 09, 2002, 08:47:58 PM »
several coats of wax and several layers of PVA usually work.  I know a guy who made a kit long time ago (he taught at a technical college in Fla).  He recommended up to 7 coats of PVA.  According to him it would separate with out damaging the original.  I wish I knew where the directions were, because I wrote it all down when talking with him about it.
« Last Edit: December 31, 1969, 05:00:00 PM by 1043298000 » Logged
Amida
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« Reply #5 on: October 10, 2002, 04:49:50 AM »
Minimizing the heat build-up of the resin is key.  Do not lay down more than 2 layers of mat at a time.  Adjust amount of catalyst to provide a slower curing rate to prevent too much heat build-up.  If the paint is fully cured, several coats of mold release wax and PVA should do the trick.  
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Tat2_Keith
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« Reply #6 on: October 10, 2002, 03:22:48 PM »
The best way to avoid damage is to use 1/2% hardner and a polyester tooling resin with atleast 3 coats of tooling gelcoat.As for ensuring a safe release, wax 6 times with Partall#2 release wax and the heavier purple PVA.
« Last Edit: December 31, 1969, 05:00:00 PM by 1043298000 » Logged
G-Nasty
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« Reply #7 on: October 14, 2002, 03:53:56 PM »
Thanks for the technical help & replies-
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