If you have a phenolic core roller. You can typically clean them. I’d go with mineral spirits first then lacquer thinner if that didn’t work. I use lacquer thinner exclusively on my spray guns. wrapping rollers in foil works if it’s cool enough and soon enough but honestly hasn’t worked well for me. If you’re working with activated (2 part paint) clean before it kicks or throw it away.
Clean your rollers before use. At least use masking tape to remove lint. And buy lots and I mean LOTS of tack rags. A flaw on your roller will cover a huge area and be miserable to get out. Strain your paint to and don’t reuse trays and clean those. Nonskid is your only exception b/c you want texture there.
Better to have too many than too few covers but 20 seems like a lot unless you don’t try to reuse them.
Redtree is my preferred roller brand. There’s a place for large diameter and small diameter rollers. I think you can cover more ground with large rollers but a better finish is more easily achieved (at least for me with a small diameter roller). My sweet spot was small diameter but long roller. Practice with a roller and a decent amount before you start it’s worth it in long run. Additive and tipping is a big deal. Keep a brush in pocket even if not tipping trust me it’s saved me more time than I can count.
But once you start spraying you’ll never go back.
Here’s my current favorite gun with my small compressor. Until I get my big compressor…$2k and then $1k guns. Can’t justify it at moment. But I’m spraying boats and cars and all kinds of stuff.
https://www.eastwood.com/concours-lt...gun-1-3mm.html