Originally posted by hambiskit
Good point there HP, there's nothing worse than subcoat failure....well, except falling over into the wet paint- 'bout the same work to repair.
Been there - done that, used a "cheaper" primer, sealer failed, stopped after the first color coat, resanded * re glazed because the paint ate it, re-primed with quality primer, re-sealed with proper coats of sealer, re-painted. Cost of cheaper primer : 400 bucks & 10 extra days....what a savings.
I'm assuming the other painters here will agree, that you need to find products that work every time. It is a lot of hours and materials cost invested, to take a chance on something that isn't reliable. Cheaper does not mean it's a better choice!

I had a guy working for me once, that wanted to try a new paint product on every job. I would hear comments from him like "That worked pretty well! Next time lets try something different." Obviously, I put an end to that way of thinking! :-)

Go with products that these guys have used successfully.