[Jamie]

I usually take a paint brush and a can of compressed air and get rid of the coating of dust. Then I'll pull each tube, clean them up good, spray some contact cleaner in the tube sockets. After that, I'll clean up the tuning condensor in the same manner. No paint unless the chassis is totally trashed.

If you used compressed air, be careful where you spray it. It can cause problems if sprayed directly into the IF cans, or near anything with mica sheets in it. The one thing you do not want to see is your own little personal snow shower of mica crystals. (Don't ask me how I know this).