Over priced lacquer thinner.
When I uncapped the metal canister, I took a whiff at the opening and it smells just like lacquer thinner.  Since I have heard that petroleum based lacquer thinner is no longer sold in some places, this may be your best bet.  Even though it is overpriced, it does work, just like lacquer thinner.  I cleaned a metal plate and put JBWeld on it, and it seems to be curing OK.  I use bluing for marking out cuts on sheets of metal, so I used acetate to clean the metal, and the bluing would thin out and turn a light pink and purple.  I thought acetate would clean anything off!!!  I ended up using rubbing alcohol, and while not ideal, it did allow a better coating of bluing.  I haven't tried the "Layout fluid remover and prep" yet on metal for the purpose of applying bluing, but will update this if I find that it doesn't work like it is supposed to.  It it does work, I'm going get lacquer thinner and try that when I use this stuff up.  You can buy a gallon of lacquer thinner for what slightly less than a liter of this stuff costs.
Rating: 3 stars