Clean or shine Aluminum on the cheap
A cheap way to clean bare aluminum is to use an S.O.S pad. Takes a little effort but is cheap and no nasty chemicals. I think the soap in the S.O.S pad is even biodegradable.
I even did this to 4 cyl, aluminum head and and had to replace a the valve cover gasket 6 years later and it still looks looked shiny and prevented varnish from sticking.
Millermatic 251 with 30A
Synchrowave 180
Hobart 100 MIG
lathe & RF45
Power TIG 250EX
Spectrum 625 X-TREME
Spray Zone.net-Side draft spray booth