The lower rocker trim is attached by a small nut at the door opening end, the clips which hold it in place can be accessed by removing the door pad. You can then pinch the clips from inside, and the moulding will come off easly.
The upper body line moulding will require, a clip remover or metal scraper/spreader. Start at one side of the moulding, (you will have to feel the clips out) press on the top part of the clip, genlty pull out on the moulding. The do the same on the bottom, work your way across.
I took mine off a few weeks ago, if you break the blue end clips, yes you will have to buy a new moulding, unless you urethane them back on, the white clips can be replaced.
I am in the process of painting my crx, as well don't take short cuts, it will look worse in the end.
Good luck.