Quick Question

Would you recommend using a hair dryer to shape foams?

I've tried it,its doesn't get hot enough.

nope does not work.
Waste of time and energy.
Get a heat gun, if you are only doing a little bit you can get some nice small ones at craft stores, however I would suggest going to a hardware store and getting a heavy duty one, they normaly come with at least two settings, sometimes more.

I hope this will help.