@Lou1985 posted:Any automotive polish will work. Just use a light one (i.e. not a cutting compound) and polish only the area you are going to place the decal. Just give it a bit of gloss/smooth it out. You don't polish the whole model, just the area you are decaling. The rest of the model will still have matte/flat paint. Apply decals to the area you polished, let the dry, clear coat, done.
Automotive polish only. No wax, no combination polish/wax either. Automotive polish should not leave behind any reside. It just brings up the gloss on a surface and does not provide protection/water beading like a wax.
Thanks so much for your advice on using polish. Here is a tender that I just painted and applied the decals using the process with polish.