Vintage Asylum: My inherited Sherwood S-8800 FET by karlyn

A couple of weeks ago I came home with my parents' old Sherwood S-8800 FET (and the AR-4x speakers that were used in the den). I hooked it up to my TT and CD changer and it sounds as good as I remembered. It was well taken care of until recently -- it spent the last two years boxed up in the basement and there is a little corrosion. Even so, most everything seems to function quite well except:

-- the power switch/volume control is scratchy and sometimes I have to turn it off and on to get the left channel working

-- the FM hush and preamp level controls are a bit stiff

-- the tuner is a bit out of alignment but since I don't listen to the radio very often it's not a big deal to me

I've been trying to read up on how to clean it up a bit but am not sure which of the DeoxITs I should be using to clean the power switch/volume control -- faderlube or d5 or?

Thanks for any advice on this,
karlyn

P.S Wish I'd seen the one that sold on ebay for $10.50 before the auction ended since this one has no case (my dad built it into a credenza and if it had a case it's likely long gone).