Dealt with these folks here in Dayton for some industrial applications. Good folks. No complaints. Never for flash chrome though.

Checked out US Chrome and this was on the website..

Try Atlas Chrome in Houston, TX..

I was in contact with The Chrome Shop, without seeing my valve covers, they quoted me $225 - $280 ea. I think I am going to give them a try after they responded to all my concerns.

After seeing the photo's of the air cleaner you sent me, I have corresponded with Dan at The Chrome Shop and I will be sending 11 BB valve covers out on Monday. For those of you who might be interested in buying original GM valve covers, I am only sending out 1969 Camaro & 1970 Chevelle valve covers that will be available in the future.

I’d be interested in a set of 70 when they’re done. Jeff in nj

This Canadian plater will do nickel and chrome - no copper - but shipping requires dealing with FedEx/UPS Customs. https://www.dependableplating.com.

I will say this if the metal is pitted it will come back looking pitted. Filling the pits involves copper plating and buffing. I had them do an air cleaner as flash chrome and the pits do show.
This process will not hide any defects.

None of my valve covers are pitted and if you go to there website and see the process I told Dan specifically not to do any of the covers that he feels will not have good results, I also told him to not remove the dimples and keep me informed. He is booking into February, so he is a little busy but I am fine with that, I will post the photo's when I get them back.

Without ever having this done, I'd suspect it'd result in the same finish as a brake booster with corrosion trails from brake fluid leaks. Not pitted, but a bit rough to the feel. Anything but virgin metal may be noticable????