>B.) Metal conducts heat away from the area beneath the heat gun,
>thus reducing its effectiveness in that application.
Bingo. Metal -- particularly aluminum -- is a good conductor of
heat. It's hard to get it locally hot enough to melt paint without
quite a large input of heat. A consumer grade heat gun doesn't
really put out that much heat, so you'll only be able to raise the
temperature of the whole workpiece a few or ten of degrees above
ambient, and locally not a whole lot more than that. A higher
powered heat source, like a torch, or an industrial heat gun (the one
I borrowed from my father's lab is 1800 W, and puts out air heated to
250 or 300 F on it's highest heat, lowest flow setting), or an oven
(though getting a roof in one would be hard), is needed.
Masonite, wood, and other things made with cellulose are not very
good conductors of heat, so you'll not raise the temperature of the
whole workpiece very much, but can get the part under the gun quite
hot.
_______________________________________________
LRO mailing list
LRO@land-rover.team.net
http://land-rover.team.net/mailman/listinfo/lro
This archive was generated by hypermail 2b30 : Mon Dec 09 2002 - 16:47:22 EST