Quote:



I added the Penetrol to the Brightside according to the instructions on the Penetrol can, then I added mineral spirits to the mix until I was able to get a flow rate of 25 seconds from a zhan cup.




That is my recipe. I don't remember the exact ratio of Penetrol to the Brightside but the ratio is on the Penetrol can. The zhan cup is the little plastic paint viscosity measuring cup that came with a piece-of-crap electric sprayer that I bought years ago. I found that a reading of 25 seconds for the cup to empty to be pretty close to perfect for my painting style. The good part with the zhan cup method is that the 25 seconds to empty viscosity level seemed to work just fine on warmer days and also on cooler days as the viscosity is temp dependent.