Just clean and warm, not cold. i heat the siles sheet panels to 150 so by the time I'm ready to apply, they are close to the same temp as the surface of the metal (say 90-100) Warm, not real hot. By heating the panels (regardless of how you end up doing that) by the time you apply them, that aluminum on Siles will dissipate a lot of the heat, they always seem to be close, within about 10-15 degrees by the time I'm ready. I like the oven cause once you turn it off, they stay relatively warm and ready. There is absolutely no smell with the soles that you have, I've done several with that stuff, it works well when the surface is clean and the sheets are warm too. I even left the oven on one time, at 150, came out the next morning, saw the light on and it was not melted, just a bit "bendy"Man I got that's same gun! Been a champ all the years I've had it.
So how hot is hot enough to apply? The surface that is.
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