I bought one last week when I got tired of trying to get all the gunk out of a 100 year old colt 1903. It works wonders on small parts and places that are difficult to reach. However, I don't think it will do much or anything for lead, heavy carbon or copper fouling. I've use Krud Kutter, diluted. I also plan to use it for general degreasing on bluing jobs. That is something that it shines at.
I think the high end machines would do a much better job, but I am unwilling to spend $500+ for something that just won't get that much use.
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