Doing it now
Acetone clean to get off oils, etc.
150 grit sand inside and out. Inside will have surface rust more than likely, mine did.
Primer inside and out. 200 grit sand.
Paint inside flat black.
Primer outside again. 400 grit wet sand.
Ready to paint.
No need for heavy sanding unless rust present. I used a drill with a 2" steel brush attachment to get most of the rust off. Some pics of my incomplete process are on my website.
I'll have some finished product pics up this weekend as the final coat goes on.
:guitar2: