Yes. I would send them out or do them yourself. This stuff works great. Best I have used and I have tried many different formulations.
https://www.ebay.com/itm/BLACK-PARKE...sAAOSw8kRcLWU-
If you want to keep them painted you might want to hit them with a very dry spray.
I have a lot more experience now than I did 4 years ago.
Again, everything looks great.