OK, here are my tips and tricks to powder coating a provari.
First when picking a color I would always go with a translucent color, the depth would just pop on them and it would also allow the lettering and design to show perfectly on the v2.5 provari. The brand I would use was
Columbia Powder Coating.
Secondly the finish of the existing provari, satin silver or polished worked best if you didn't want to have to strip the existing finish if you are wanting to go with a translucent color. If you have any other color provari I would suggest sanding it, do not sand blast unless you want to have to sand and polish a lot. Sand blasting will make the finish a lot darker, again if you are using a translucent. If you choose to use a solid color then it really doesn't matter. Also if you are using a translucent color then you will want to do the extension at the same time as it can be hard to match the tint exactly if you don't, and again with a solid it doesn't matter.
Thirdly removing the electronics. Be careful here as it is easy to hurt the electronics. I have a post showing how to remove the electronics
here. If you mess them up then be prepared to pay $40 to provape to repair. During this process you will also remove the bottom and screen.
Now you are ready to have your provari powder coated.
After having powder coated you will need to sand the inside of the tube where the top goes on, if not you will catch a heck of a time getting it back in. You will also need to sand the edges of the button hole and where the window goes in.
Before you put the top back on use a hot glue gun and secure your board back into place and let dry for at least 30 mins. When you go to put the top back on a rubber mallet works good. I would usually put the tube on a magazine or catalog when putting the top back on to ensure I did not scar the finish on the bottom.