You also need to plug all of the critical holes, so the powder doesn't get in, 'cause it's an absolute bitch to clean out.
I actually prefer two pot polyeurethanes, but if you want to powder coat a frame I suggest you make up steel plugs for the steering head and swingarm bearing cavities, with a bit of screwed rod and a couple of nuts holding them in place. The steel plugs tend to heat up more slowly and the powder doesn't stick to them, also seems to bead to a stop at the plug, so you get a nice edge and removing the plug doesn't damage the finish.
Goes without saying, make sure the powder is suitable for the application.
Go soothingly on the grease mud, as there lurks the skid demon
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