Be sure to neutralize the Ospho before applying anything over it. If not it leaves a film that will cause adhesion problems.
I made this mistake once and it cost me a complete redo of the roof on my signature car.
Once you have the rust converted, apply another coat of Ospho and then before it tries wash it off with soap and water using a Maroon Scotchbrite pad. Rinse well and blow dry with an air hose. Wipe it down with 710 Wax and Grease remover and let flash completely.
What do you mean "flash completely"? Flash rust?
It was embarrassed and totally lost this morning after following the their tech advice to rinse off Ospho 2nd coating. The flash rust appeared after 20 minutes and must redo again. Maybe better to wash before sanding and applying Ospho then brushing off white powder and air blowing but NOT A DROP OF WATER after that! It wastes a lot time, money.
I like Ospho to wipe out rush fast then brushing off next day, but I regard it is NOT EXCELLENT PRODUCT any more.
Well Jim I know you said don’t wait a month but I had to lol. No signs of flash rust on any part/s the frame has been bare for 3-4 months and not a spot of flash rust anywhere. Still plan on doing some touch up blasting and cleaning with 700 WG
I put a sealer coat down 1:1 with 50% acetone to dull the gloss. Some of my parts are dull and some are gloss. From what I can figure I guess I went to heavy on the parts that are gloss and just right on the parts that are dull. Live and learn I guess.
mixed at the same ratios will I run into trouble if I apply another sealer coat?
Basically is it ok to apply more than one sealer coat?