How can/should I remove paint from my overhangs?
you have a couple of options:

1) sand it down, depending on how sound the paint is you could just sand down and then prime again before painting, however the paint applied to these patches may come off with the underlying paint in the future

2) best option for me is get some eco paint stripper gel, paint it on the paint patches generously and then attach some cling (PVC food wrap) film secured with drawing pins. The cling film will initially hold on to the gel quite well, but as the gel penetrates the paint it will fall off, hence the drawing pins. Leave it 24h and it should scrape off quite readily