Darryl Keil
Posts: 1455
Joined: 2003-05-22
Location: Maine
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The white specks can be one of two things, the acid salt crystals like you suspected, or titanium dioxide, which is only in the medium hardener. If you rub the titanium dioxide spots they will smear out, the acid salt crystals will not and feel like sand under your finger.
You dont HAVE to thoroughly dissolve either one but leaving undissolved acid salt crystals can, but not always, have certain consequences, like spot staining where the crystal sits under the veneer. A little bit of undissolved crystals is OK in general. The titanium dioxide is just a colorant to give the hardener its medium brown color.
You do not have to use a paint mixer, a whisk is fine. I will make a suggestion though, an electric whisk really does a great job. I have one and love it. Got mine on Amazon.
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