I hear ya. Apparently though the virgin is a more potent solvent than regular lacquer thinner or mineral spirits. Says you can use mineral spirits to clean the block but for the cylinder bores, you want a more potent cleaning agent. Since they got specific with using two solvents, one for the block and one for the cylinders, I want peace of mind on EVERYTHING.
Still can't find this stuff anywhere and apparently paint shops are closed on Sundays. I could order it online but weekends are perfect for builds; be great to just go somewhere and get it, come back to the house and drop those pistons in.