Low temp powders?

[speedyshark]

Can any one tell me where to get small amounts like 1-5 lb of low temp. I am trying to find powders that cure around or under 300f. Sherwin Williams has custom made powder for plastics but it only comes in 50lb. I am going to try and coat the plastic with a material to make it conductive. Or can someone tell me where to find uv cure powder and if it would be better. Thanks for any help.

[jtagger19]

if you coat the plastic with a conductive paint it will crack at cure temps
I have been able to coat plastic at 50Kv
problem is plastic melts at cure temps

[speedyshark]

I was going to coat the plastic with copper powder do you think that will crack? If it is calling for 10 min@400 I guess it will not work to put it at lower temp for longer time.