You might want to check and see if the paint needs cleaning. I have redone many old machines using TR3 and about a million cotton balls. Sometimes you think there is no finish, but after a lot of yucky cotton balls, the shine appears. Does not hurt decals, does not have abrasives. It is made for clear coat car finishes. I bought mine at Pep Boys, and it has done amazing things to many old machines. It takes a lot of elbow grease as you have to work in small circles and use a lot of cotton balls, but it is glorious when done.