Help with putty

Thank you!

Pics of my car projects are here:

http://www.hobbytalk.com/bbs1/showthread.php?t=89475

best,

deane

Hi deane

Evercoat (or other similar brands) doesn't shrink at all because it hardens by chemical reaction. You just gotta make sure you mix in the right proportion. Too rich and it'll kick too fast. Too lean and it may never harden.

Milliput also hardens by chemical reaction. You blend two equal parts of A and B and mix with your fingers. It's probably cleaner to work with because you can work it with your favorite tools and water.

As for tearing out and starting over, it depends how far along you are. AS long as there's not too much cracking, I'd leave it. Just make sure that you prime everything well before you paint as hobby putty is very porous and has a different texture than plastic.

Can't wait to see the finished pics.
Cheers!
Bert

Thank you for your response!

Yes, I want to build up large layers (several millimeters) as wheel covers, in addition to hood/fender modifications. I have used bondo and foil to build large areas, but was using white putty to fill in the details. With all of the hard work involved, I didn't want it to go to waste.

How much shrinkage will occur? Is it worth tearing out and starting over?

deane

Hi Deane!

Hobby putty will shrink and/or crack if applied in too heavy a layer. So just apply in thin coats. Are you trying to biuld up body contours with this stuff? If you are, try Milliput which is a two part epoxy putty or try Evercoat which is a two part catylized putty that body shops use. This stuff doesn't stick well to plastic so you need to scuff the plastic with a knife blade to give the putty something to bite on. For more info look up articles in FSM and SAE by Mark Gustavson. He has vast knowledge on this topic. Hope this helps.