Anybody use a filler before powdercoating?

DJMN

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I'm going to have some parts that will need powdercoating (coin doors/brackets/etc). I want to get these as near perfect I can before doing so. I'll pound out dents as best as possible but I assume I'd still need some sort of filler to get things nice and smooth in areas.
I've heard of some fillers like Hi Temp Lab Metal. Anybody here ever use it or something similar? Wondering how well the powdercoating sticks to it, and if you can get it to look pretty seemless?
 
I've never used filler before coating but perhaps the place that's doing you coating can recommend something they've worked with.
 
I no expert but I think powder coating works by using electro-static to stick the powder to the metal before curing with heat, so if that's true being filler doesn't conduct I can't see it working well, assuming it wouldn't just melt off anyway during curing.
 
That's why I mentioned the Hi Temp Lab Metal. Apparently it can withstand temps up to 1000 degrees (not sure the temp used for powdercoating though) and is conductive for powdercoating. Curious if anyone has used it or an equivalent and what their outcome was.
 
I've been powdercoating at home for about 10 years and tried using a "metallic" filler. I would say try a small sample piece first before you do everything. As mentioned above, the filler needs to be metallic so it conducts and must withstand heat (about 400 for powdercoating). Also, just like a car, use as little of the filler as possible.
 
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