If possible, keep your enlarging and film station completely apart from the sink and processing area. I use completely different rooms. Something like a neoprene apron is nice if you're worried about splash. But for lint-free applications around the enlarger, what you want is a 100% dacron
true cleanroom smock or lab coat that never comes in contact with your chemicals. They don't come in black, but are otherwise ideal, washable, and almost zero lint. Most cleanroom suppliers will have them, or a general industrial supply like McMaster.com.