I spent months reading and reviewing all of your info. Let my new deck cure. Cleaned and Restored it, then stained according to the instructions....to the tee. Now, after just a few days I have white streaks and white spots.....not just at the knot holes either. Can this be remedied?? It looks horrible. I hate to think after all that time, sweat and energy, this is what I'm left with on a brand new deck. I'm including pics.
That is sap leeching from the wood. Not much you can do to stop it or remove it without harming the coating. Many will use a paint thinner solvent to try and wipe off the white sap. Not sure how effective it is.