If you look at the ingredients of a LOT of brands of lacquer thinner, it will say "acetone" or "100% acetone". I have been buying and using Kleen Strip from Home Depot like many others.
   Type at you later,
   Dan McEntee

               I came across this when I purchased Dupli-Color lacquer thinner. Some cans even say on them virgin lacquer thinner but the can states 100% acetone.

   That's interesting, I haven't seen that and what you can normally get at a hardware store around here is definitely not just straight acetone. For a while, we couldn't get regular oil-based paint thinner, due to the ongoing war with the CARB, and some of the substitute "paint thnner" was actually acetone, which of course was disastrous for most paint thinner uses. Last time I checked we could get mineral-spirit-based paint thinner again, but it's an ongoing game of "whack-a-mole" between the CARB and the hardware chains.

    Brett

    Yeah, we have covered this ground before. I went around and bought quart cans of lacquer thinner from all the hardware stores , auto parts stores, and big box home improvement stores to to check them out and see what they were like. Almost everyone said "acetone" for the ingredients. This might be a regional thing. I remember when we could get DuPont 3608S thinner here in my area with no problem, and pretty reasonably priced. Back east, it was changed from an "S" to a "W" and it didn't work the same. DuPont is now called something else and I don't know what the hell they sell now! Somebody mentioned the Kleen Strip brand from Home Depot as working well with SIG dope and I have used that ever since when needed. This is just one of those instances where change isn't necessarily a good thing!!
  Type at you later,
  Dan McEntee

    Yeah, we have covered this ground before. I went around and bought quart cans of lacquer thinner from all the hardware stores , auto parts stores, and big box home improvement stores to to check them out and see what they were like. Almost everyone said "acetone" for the ingredients. This might be a regional thing. I remember when we could get DuPont 3608S thinner here in my area with no problem, and pretty reasonably priced. Back east, it was changed from an "S" to a "W" and it didn't work the same. DuPont is now called something else and I don't know what the hell they sell now! Somebody mentioned the Kleen Strip brand from Home Depot as working well with SIG dope and I have used that ever since when needed. This is just one of those instances where change isn't necessarily a good thing!!
  Type at you later,
  Dan McEntee

  There are really two things going on, one is the "whack-a-mole" trying to dodge various local air quality officials, and, changing the formula based on what solvents are cheapest when they go to buy it. The latter is presumably why one batch of Brodak dope is incompatible with the previous batch or suddently stops being fuel-resistant  and probably the same when Aero-Gloss "dope"/acrylic lacquer was still around.

   So, what you get from day to day varies, unless is is a product from one of the large automotive finish suppliers. That's also why I think it is a really good idea to avoid counting on hardware-store and other uncontrolled/undocumented products.

       Brett