08-19-2018, 01:52 AM
If the rust is bad enough, sometimes it's worth stripping parts down parts like transformer bells (covers), or chassis, and running them through an electrolysis rust striping tank, quite often it will even take the old paint off. I don't know how far you want to go but you could look into stripping the rest of the power supply chassis down and replating it with zinc.
Regards
Arran
Regards
Arran