Come on now, stop picking on my new paint job. HAHAHA!!

I use a small emboss heat gun for RC decals on contoured surfaces. I install clear bra, tint, and vinyl on real cars as a hobby so this is basically the same principle just using a smaller low power heat gun.

As for temperature, I don't know the exact temperature, but I place my thumb near where I am applying heat to get an idea of how hot the surface is getting.

So first step is to position your decal on the area you want to apply. Then grab your heat gun and apply heat (while placing thumb next to the decal to monitor temperature). As soon as you can see the decal get flimsy, it is hot enough to gently push it against the body to adhere. I use a soft silicon squeegee. If applied correctly, the decal will wrap onto the body and appear as if it is a coat of paint. Once cool, it will retain its shape.

Here is what a small emboss heat gun looks like. I don't use my regular heatgun as it gets too hot and heats too big of an area at once. Hair driers blow too much unwanted air, so I don't use that either.

http://www.amazon.com/s/ref=nb_sb_no...emboss+heatgun