Ace Hardware. Where I buy my four-ought. I also use bronze wool some. REAL soft.
I have seen the Big .45 in use and it appears to work well. It or an item like it has been around a while. Looks like a Chor-Girl skillet scouring pad. I believe these were made out of magnesium I was told. You would see guys using them on their guns at gunshows before they put them out on the tables.
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