Douglas R. Hortvet, Jr. wrote:
Thanks Barry.

Applied the SealCoat with a dry cloth and the humidity was uncommonly dry - at least for
Houston.

When applying - should I leave the material on the surface or try to rub in / buff out?

Wipe on & STOP! G

If you keep rubbing, you'll just make a sticky mess.

There isn't much else the white can be other than moisture or debris.
Did you sweat on it? No, I'm not kidding... Drops of sweat blush
lacquer and shellac.