Back when I was shooting PPC competitively I used Star 38 cal wadcutter bullets, those bullets were swaged rather than cast, the swaged bullets are very soft lead, and leave behind a tremendous amount of leading in the barrels and forward part of the cylinders. I had been using the Lewis Lead Remover for many years, it was the only way I knew to remove leading, scrubbing with a bore brush just doesn't work. The Lewis Lead Remover worked, it was slow and labor intensive, but it did work. At one point I bought a video on the care and cleaning of the 1911 by Bill Wilson of Wilson Custom, in that video he demonstrated the Chore Boy method, I tried it, WOW! The difference was night and day, the Chore Boy method really worked! FAR faster, FAR cheaper and FAR more effective that the Lewis Lead Remover, I can't emphasize how much better that method works.
To give you some idea, the front end of the cylinders would be completely covered with a thick coating of lead at the end of a match, it was very easy to see the gray lead instead of the black coloring you should be seeing. With the Lewis Lead Remover you could easily spend an hour working on removing the lead from the cylinder, and at the end of that time you might only have 50 % of it removed, with the Chore Boy method that same area, with the 6 chambers would be completely deleaded in about 10 minutes.
The hard cast bullets we use these days are less prone to leading, but if I have any to remove, the Chore Boy comes out, an ordinary pair of scissors easily cuts a patch out of the copper, wrap it around a bronze bore brush and go to it!
Hopefully the clerks will believe that you aren't buying it to use in a crack pipe, since that is a common use for that product!