good choice. unless you can get a PC that specifically does bike (like a frame builder), anything can happen.

they may sandblast with too strong of media and blast a hole right in your frame. they might powder your bottom bracket, seat tube, head tube, mounts, and/or braze ons. it might look like thick, uneven, wet paint. it might crack when you put in your headset/seatpost/front derailleur.

of course, there are plenty of fine PCs out there, but these things can happen. especially at the lower price points.