The pink foam is pretty durable and able to withstand a variety of heat and weather situations, however, it might be a good idea to waterproof your foam props, especially if they will be out side or in a damp environment. I have had had success painting on a coat of "Drylok" masonry waterproof sealant on. You can buy a pint or gallon at home improvement stores. Once it dries, paint your prop as normal.
|objects made from pink foam|
For example: To achieve certain texture effects, you can use acetone to eat away at the foam.
But, if you finish carving a really detailed project and try to spray paint it, you will watch it melt before your eyes. Hot glue will melt away the foam where ever it touches, so its best to use other types of glues (or non-glues). I found that Aleen's Tacky Glue, and white silicone caulk work well. I have also heard that Glidden Gripper works well at adhering the foam together and it's actually a primer...
|Mary Poppins umbrella handle carved out of pink foam|
for my Halloween costume 2013
So whatever your craft or prop is, chances are you can use insulation foam to make it. Go to your local Home Depot or Lowe's, get some insulation foam and start experimenting, you will be so glad you did.
|large NBC skull carved out of pink foam 12"x12"|