[Robert McLinden]

My leaf spring car (KMPS036) used pop rivets to install all the panels you speak of. I have removed all mine and had them powder coated much like you plan on doing. Although I have yet to reinstall them I will be using CR (Cherry Rivets) obtained from either Aircraft Spruce or Wicks Aircraft Supply. Sometimes your local airport will have a source of supply also.

These are aircraft structural rivets of almost the same strenght as AD rivets. My panels were fastened largely to tube and so solid rivets are out of the question.