Ronal has been making wheels for a long time and I didn't know too much about them aside from seeing the name now and then. I guess they were pretty popular in Europe at least from what I can gather. I did a little research and finally figured out mine were R9's. They had been painted and re-painted quite a few times, so I had my work cut out for me.
My typical approach when painting wheels is this:
-1 coat of self etching primer
-2 coats of wheel paint (In this case, a satin black on the outer part of wheel and a texturized paint on the spokes since these already had a texture on them). I use a brand of paint from Autozone, it runs about $8/can.
It took me about 6 hours worth of work, but they turned out pretty good and gave the van a whole new presence.