Weird indeed. They look very regular. The only thing I can think of is moisture under the paintwork. Did you buy new or secondhand?
It was secondhand but the guy I bought it from (3 years ago) bought it new and only used it a few times on the track. The frame looks 'as new' - not the slightest mark on it (except for these yellow streaks which appeared within the last few months).
It was secondhand but the guy I bought it from (3 years ago) bought it new and only used it a few times on the track. The frame looks 'as new' - not the slightest mark on it (except for these yellow streaks which appeared within the last few months).