Got a pack of these to use with thick epoxy paint. It does shed. Not really badly but enough. I also bought these Shed-Resistant Knit High-Density Fabric Roller. They look more like wool and they did not shed.
It could be a larger nap size would provide better coverage for your project. The 1/2" nap is excellent for semi-rough surfaces. If painting a rough surface, you may want to go to a 3/4" or 1" nap depending on the texture of your surface. We always welcome calls to Wooster Customer Service at 800-392-7246. We would be happy to help you choose the perfect applicator for your project.
Works well. Soaks up quite a bit of paint at a time and applies evenly without dripping. No issues with fibers coming off. Depending on the paint you can almost get full coverage with one coat and some minor touchups after it dries