I have a silly little project that I bet you folks can help me on,
if you will.
I want to mold a small metal object that is very very thin-- TOO
thin. So, what is the best material to paint on the back to thicken
it up a bit? Epoxy? Nail polish? Paint? It can be a rubber mold, or
RTV.
I’d bet on epoxy, but why make your own mistakes when others have
already made them for you?
Noel, I have done just this using some old toys I had and I used the
UV resin. I was able to fill the entire piece since it had a depth of
only a centimeter and a half anyway. Hope this helps.
Sheet wax works good with RTV molds but for vulcanizing rubber molds
I use adhesive aluminum tape from hardware store. You can layer it
as needed and trim each layer with an Exacto knife as you go. Make
sure you burnish well each layer. At the end you can just peel it
off.
I covered the back of a thin textured heart with paper clay, sold at
Michael’s/ A. C.Moore. Had cold mold made. Came out TOO thick! Also,
since they were contoured [undulating] some of the paper cracked off
but only AFTER the mold had been made.
While we’re at it I need to make the back of a sterling hand tooled
Infinity symbol thicker in one area. Paper clay would not work, so I
await solution. Anyone?
I've thickened thin pieces with one or more coats of epoxy gel on
the back.
OK, if we can be sure epoxy does not interact in some negative way
with cold molding material, that would be good. The piece is a very
thin (.15mm in some spots) undulating dome shape (half a stepped
bead) so I need to be able to paint something on.