Originally Posted by
alcjphil
If the cup was cross threaded, your best option is to have the the threads cleaned up by a shop with the proper tool
Originally Posted by
Slash5
Off hand I'd say the problem is more likely that you are cross threading the cup. That's nothing to do with the paint. Remove it and try again until it goes in straight. If you can't get it to thread straight then you'll need to get it chased and faced.
I had the same problem with the paint and went over it with a pick then wire brush. Worked fine - since it was Italian threaded might even help keep it tight.
The BB cups went it and came out before the repainting job, hence why I believe it to be the paint that is stopping the threads of the cup aligning with threads in the shell. If it does turn out to be the threads after all, then my friend will have to get the threads chased/retapped at a local shop.