Thank you; I was wondering how much pressure to apply. Like I mentioned. you can't see rust by looking at it. I did as as both of you mentioned using clensoil. I applied only very light pressure. There was some grime/discoloration on the rag I used to wipe the excess off, not alot but some. The barrels look pretty much the same. I will look at the barrels tomorrow under other lighting and take some more closeups. Thanks again