Recently I cleaned the cam covers on my 1984 308 QV. Perhaps I did this too vigorously. At any rate, the result was a blotchy finish. This blotchy finish could, of course, always have been there and just hidden by the oily dirt. So I am looking for some way to bring back the original surface finish on the cam covers. I do not want a shiny finish, just the original, rather subtle, finish. Any suggestions would certainly be appreciated.