Protective spray for styrofoam

[Canas]

I tried making a hill using styrofoam. The spraycan of paint made it melt. Which fortunatly turned out to look halfway decent so I continued anyway. But now I want to put some protective spray on it to stop the paint from chipping, unfortunatly when trying the usual varnish I use on a new bit of styrofoam it melted that as well.

Anyone have any idea what I should use?

 

[pendrake]

Water based acrylics. Water based acrylics. Water based acrylics.

ALL rattlecans Melt: Styrofoam®, Foamular®, and the white beaded material people call Styrofoam ( <== because they don’t realize that word is a Dow Chemical trademark ).

The only exception is RUSTOLEUM® Brand products. Some of their cans are safe for expanded polystyrene objects. But not all of them!

To seal: use (brush on) acrylic matte medium. Use gloss if a wet look is wanted.

 

[Canas]

Cool, Il try and see if the paintstore has it outside of spraycans then.

 

[Crowsfoot]

Cool, Il try and see if the paintstore has it outside of spraycans then.

Pva glue mixed with water, apply a few coats

 

[The Red Devil]

As @Crowsfoot mentioned, the cheapest solution is watered down PVA glue.

If you have any wallpaper/floor glue lying around, you can also use that watered down.

 

[Canas]

Found some varnish that didn't come in a spraycan so it didn't melt the stuff anymore.

The results: