the OLD thinners may be getting hard to find, but guess what, the CORRECT thinner that is designed and formulated for using with Brodak Dope, is still available,, from BRODAK.
Laquer is an engineered compound, designed to work a specific way, please, use the correct thinner that was designed and engineered to be used with the product, it WILL save you headaches in the long run. YOu only save pennies per hour by using cheaper thinner its a False sense of economy to be using less expensive thinner. HOw many hours do you have invested in getting the plane ready for paint? and what will you save, 15 or 20 $.?