If you are talking about a typical home heat gun for use around the house for things like stripping paint be VERY careful as they get TOO hot.

You can get one that operates in the correct temp range fairly cheap at the LHS
http://www2.towerhobbies.com/cgi-bin...&I=LXJD39&P=ML
and not melt thru your covering.

BTW, it's normal for ARF's and RTF's to arrive wrinkled like that. Usually the instructions will tell you to take out the wrinkles - it's expected by them too.

Also, this is a typical iron.
http://www2.towerhobbies.com/cgi-bin...?&I=LXB357&P=7