Jollypopper,
Those types of "commecial" heat guns get way too hot for out applications. The heat guns that we use for shrinking covering will run ~400°. While you could use a gun like you mentioned it would more than likely be more trouble than it's worth because it would be too easy to burn or melt the covering material. It $15.90 it's not much of a bargain either because you can get a Hobbico heat gun at Tower Hobbies for $11.99. [link]http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXJD39&P=ML[/link]

Ken