I purchased a new grill from classic truck parts.
Found here
http://www.classicparts.com/1968-70-...ctinfo/61-057/
The black paint on it is very poor paint. I literally put some thinner on a rag and just wiped it off. If you left it on the grill a bug hitting it would knock it off. No polishing was necessary. Just used to some windex to make sure all the thinner was off.
This is the best pic I have of my grill.