I used mineral spirits and thinned and stirred to the point where when I pulled the stir stick up I'd count 1 thru 10 hoping to see the paint go from a stream off the stick to drops around the count of 6-8 at that point I'd start painting.
Hope that makes sense.
Nothing wrong with the 333 but figured what the heck nothing to loose.
BTW I had to sand my 1st coat off because I put the paint on too thick, many light coasts are better then a few heavy coats.