Bob Adler wrote:
>At PPG paint school last year one point heavily
>stresed was use the measuring cup. The closer you get the mixing ratios
the
>longer the paint will stay on. Most important with urethanes. Novices:
I find using a wax paper cup works pretty well as an informal measuring cup.
Usually the small dixie cups, so that I don't have to measure in ractions of
a cup. My paint store has real measuring cups, which they give away (for
what the paint costs, they ought to give something away) but I usually can't
find any when the urge to paint strikes. I also do a lot of my painting
with a small jamb gun, so the small dixie cups are perfect.
In the good old days of acrylic enamel, thinning was usually pne part paint
to one part reducer to 1/4 part hardener. The amount of thinner could be
adjusted to increase or decreas drying time. You didn't need to be overly
precise about it, provided you ran a few test pieces to make sure it was
flowing correctly.
For top quality paint like PPG, they had a proprietary reducer with
different formulas related to air temp. Cheaper paint like some of the
engine enamels, could be reduced with cleanup thinner without problems.
Now, of course, we have to deal with a lot of expensive urethane, which is
not as nice to clean up. The supplier should have info on mix ratios. The
info is usually on the label too.
I'm sure that if you call Bill Hirsh, his folks will be able to tell you
what kind of thinner to use and what the ratio should be.
Once you start painting with a spray gun, you'll never but a spray can
again.
Regards,
Grant S.
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