As much as I do not think you should have to, paints across the board including Sherwin Williams paints are now loaded with chunks, bits, pieces, and who no knows what so you have to strain your paints.  SW paints have be notorious for being classified as dirty paints.  Even if you open your paint right after bringing it home from the paint store, you can still have small chunks or strands of hard paint in it. If those end up on the wall, you’ll have to pick them out and re-roll the area. So spend two minutes straining out the goobers.  Check out our website for more tips and tricks.