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No Mixing involved! You've got the best possible solution for getting all that oxidation off of your doors. Add a 1/4 cup of Sand & Scrub onto a Medium Etch & Clean Brush , then scrub it into the door and rinse it away. One gallon does approximately 50 8' x 8' doors.
Note: All surfaces need to be thoroughly de-glossed. While Sand &
Scrub has abrasive characteristics, It's use alone is not a substitute
for making sure that the proper gloss profile reduction on a SMP door is
achieved. Additional mechanical abrasion (Scotch brite pad or
sandpaper for instance) may also be needed to insure that the proper
de-glossing profile is achieved. It is up to the painter to inspect and
make sure surfaces are properly de-glossed prior to painting.
