My 71 ,when I got it, had some really, really bad skin oxidation from being parked in a field for 20+ years and tree branches rubbing back and forth against it with the wind.
It also had 36 year old Wally residue from the WBCCI logo and numbers.
I have tried various forms of goo remover and so far nothing worked very well.
Today I tried "World Famous COLONEL BRASSY industrial strength metal cleaner and polish" I got it right next door at the Estancia auto parts store. You still have to add elbow grease but this worked so good I thought I would pass this on. You may have noticed my above description is in the past tense.
Also, it's not stinky and no dangerous chemical warning.
PO Box 297
Farmington, NY 11738
800 541 1603
631 654 2161
Vertex Industries, Inc.