Spray painting high density foam

Hi experts!  I have used Testors gray spray primer enamel and it doesn’t melt my foam pieces.  Is there a similar formula in other colors that doesn’t have the melting solvents in it?  Not that I don’t like gray. Or the tiny cans.   Just wondering if you’re aware of colors and sizes options.  Spraying primer is great when you’ve got a big piece to work on.  Thank you!   Robin