Review on 🧹 3M Roloc Bristle Grade 18730 by Warrick Dembo

I have the green one suitable for iron surfacing or car body work, my words, as well as other techniques. White has a finer grit (less than 200) and works better on aluminum surfaces. Let me warn you, no matter how safe techies like me want to say, that in some situations it isn't. Polishing the surface of the cylinder head and introducing foreign objects into the engine that you may not see. Not normal. Some people smear things with oil and paper or cotton swabs like I do to plug passageways and holes. etc. Water jackets aren't a big deal if you flush them and use compressed air to remove debris. However, the inside of the engine is not perfectly clean. Many technicians will NOT use them on the surface of blocks. I do. You have to decide the risk and the right training for yourself to actually use it on the block. Other places I don't even prep I just (lightly) brush the material off and enjoy a long lasting bristle disc for about 3 heads or various jobs. I can eventually use the worn flat piece for rust on the frame or body. So I feel like I'm well needed here, but it's expensive. definitely better than 3m roloc fiber disc. More life, less trouble.