...i need to powder coat plastic...can I coat it and then cure it quickly at low temp.?
I'm not sure you can, I think you need to run an electrical charge through the piece to make the paint adhere and most plastic doesn't conduct electricity well enough to do it.
If you heat it enough to melt the powder-coat, no doubt it would melt the plastic.
Maybe if you can find a nice metallic base paint to coat the plastic with first.
I was looking into this exact question a while back. I was trying to find an inexpensive way to make a casting look like it was bronzed. Eventually, I came across conductive ceramic, but at the same time bronzing became affordable. I think you might search first for conductive plastics. The first site shows that plastics can be very conductive to a static charge. Some of the metallic coatings you can get on plastic may also work. The second site is an example of the low temp powder coating materials. The temp is listed at 250 deg.
You can't for two reasons. The first step in powder coating is to apply a positive electrical charge to what you're painting and spray on negatively charged paint powder. Since you can't electrically charge plastic, you can't apply the powder. The next step is to bake the item, which melts the paint powder and fuses it onto the item. And, the temperature required for melting the paint powder would melt the plastic.
