For the bezel, I smooth the rough edges with a DA sander then bead blast it and prime it with Rustoleum high build. On some clusters the center bottom mounting hole area is warped and needs to be straightened.
Guide coat the primer and wetsand with 500-600 grit until all the guide coat is gone. Use a grey scuff pad to smooth the primer in the ridges.
I use SparVar S120 Silver paint. Silver is correct for 1966 bezels. This is what it will look like with smoothed edges after priming and painting. The original edges are very rough from the casting process.
64-65 bezels were painted satin black.