I had to drill a drain hole in the BB shell and pour some rust converter down the seat tube at some point. Also had a bit of rust forming where the seat stay splits for a belt drive. Sanded back and sprayed with a can of matte black.
The paint bubbling just below the crack on yours looks telling tbh. I probably would have peeled that back as soon as I spotted it
I also think it might have rusted from the inside out, now I look I don’t think there’s a drain hole and the inner seat tube has been rusty. Newer Soma frames are ED coated.
I had to drill a drain hole in the BB shell and pour some rust converter down the seat tube at some point. Also had a bit of rust forming where the seat stay splits for a belt drive. Sanded back and sprayed with a can of matte black.
The paint bubbling just below the crack on yours looks telling tbh. I probably would have peeled that back as soon as I spotted it