Sounds like that may have been castrol superclean, it is very harsh and corrosive(unless the formula changed). Normally its used to clean oil off shop floors and driveways. Im suprised anyone would have recommended its use on something so delicate.
Simple green it is also a degraser it works wonders for removing acrylic and seems to dissolve enamels as well. Non toxic and non corrosive, no fumes and it can be mixed with water at diferent ratios. I often use it to clean models before painting and as an airbrush cleaner. Might be worth getting a small bottle to test on laquers as it may work for them as well.