I picked this frame up pretty cheap. Went to do the headset. The bottom cup just came right out of the frame. It seemed to be held in with the power of dirty grease. The headtube does not appear to be cracked.
I cut a strip out of a can and think with 1 layer of that it would get a pretty good press fit, although I didn't keep pressing it in and i don't know if that's a good idea or not.
The top cup is in place firmly but it has some stuff going on around it that i initially thought was rust repair but maybe it's related.

The frame is columbus SL, belgium made i think although any info on that too would be cool.
The headset is veloce, reasonable condition, although it was dry.

What should I do here?
I have a nice shimano 600 tricolour headset in the parts bin if that could help