I get a lot of requests for corrosion repair.

Sys11s and WPC games are a real bear unless it's very minor.

Sys 3-7 games, you can sand/clean a ton and you won't go through traces.
Sys11s, if you look at the traces under the battery holder sideways, the traces lift!

I turn as many away as I repair. It's a ton of work, and since I'm doing it as a business, I'm not doing it purely for pleasure. I do enjoy the work - but I have enough coming in now that I can't spend 4-5 hours tidying up a roached board and charge someone $3/hour to do the repair work :)

I bought a bead blast cabinet and new air compressor for my shop last year, to use in cleaning up alkaline damage. Hopefully, I find some more time to invest in the process.