I use them for all types of metal work and paint/rust removal on car repairs. They seem to last a very long time so I'm always on the lookout for them. Yes, you must use a face shield when using such an aggressive spoked wheel. I really like a good one like the Lincoln face shield. Please be sure, gloves, long sleeves, face shield and you will get the desired results. If you paint the surface afterwards, be aware that this disc is aggressive. So if you're looking for a glassy smooth finish, you'll need to prime and sand to get it. This disc removes material including the metal surface to be cleaned.
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