Jeff... When cleaning a gray deck like this, is there any prep you neep to do after washing before staining? I'm always looking for faster routes to the finish.Best way to do that type of graying (And Fastest),... is to mix 8 OZ. Sodium Hydroxide per gallon of water, add 1-2 OZ. of the soap of your choice as a surfactant and DS. It will begin to work immediately,..but let site a few minuted and rinse the gray away. Then neutralize with 8 OZ. Oxalic acid per gallon of water and DS.
My second choice would be to use Sodium Percarbonate applied through dedicated pump at 8 OZ. per gallon of water and neutralize as mentioned above,..
Jeff
Best way to do that type of graying (And Fastest),... is to mix 8 OZ. Sodium Hydroxide per gallon of water, add 1-2 OZ. of the soap of your choice as a surfactant and DS. It will begin to work immediately,..but let site a few minuted and rinse the gray away. Then neutralize with 8 OZ. Oxalic acid per gallon of water and DS.
My second choice would be to use Sodium Percarbonate applied through dedicated pump at 8 OZ. per gallon of water and neutralize as mentioned above,..
Jeff