For base coloring can aerosol spray like Testors orTamiya spray color be used on blue insulation styrofoam without damaging/melting the surface?
Thanks,
Leddy
Only one way to find out.
GM:
Have you ever used aerosol on blue Styrofoam?
Leddy
I don’t know. Probably. I usually use latex house paint, those cheap cans that they have on sale at the hardware store for $ 1.00 when the mix went wrong. Those usually are some tan white or brown shade.
Hello!
You can also try to put that proven coat first, and than something more aggressive on top of that for the right colour. Hope it helps, good luck with your projects and have a nice day
Paweł
Do Testor’s or Tamyia rattle cans come in acrylic?
Might depend upon the carrier solvent.
Switching to high density (pink) foam might help for having a smaller/finer grain of foam ‘bubbles’ to collapse in response to solvent.
I have to admit to a sudden curiosity on this. That, and a pondering on experimenting with some low-density open-cell foam in the scrap bin. Something along the lines of a thick, multi-coat of satin acrylic paint, than applying a heat gun from underneath.
I may need my mad scientist lab coat. The one with the sleeve that fasten in the back.
Generally they will melt the foam from what I’ve experienced. Lacquer/solvent based vs. acrylic.
The acrylics I’ve used don’t seem to adhere to foam very well. Could be the brands I was using.
What I have done is I’ve bonded card stock or thick tissue paper to the foam using thinned white glue, thinned carpenters yellow glue or very thinned gorilla glue on some of my rc foam planes when repairing after some unwanted directional changes 
Seal it up after or give it another coat of thinned glue to seal and thoroughly dry for a few days, very light sand with fine grit paper and then it will take a rattle can of any type without issue.
The same method would probably apply to what you are doing but best to test on some scraps to be sure 
-Colin.
Will echo what Pawel has said- prime with a latex paint then spray anything you want on top of that. Works like a charm