the pb blaster idea is good except for the sanding of the rust. there is a lot of surface rust. terrible factory paint job on early 80s Sekai. also, doesnt your bike end up smelling pretty strong of the pb blaster?

It is not cro mo, tange double butted hi-ten. super fancy

I appreciate all the suggestions and info so far. Ideally there would be some sort of clearcoat rust converter/inhibitor that I could give the spots a once over with. but seems most rust converters are black