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My Trim Has Gone Blotchy. What’s Wrong And How Do I Fix It?
This normally only happens with highly textured trim where you didn’t manage to get the excess product from the “valleys” of the trim. Once cured, those little lakes turn into a solid piece of quartz which can shatter into a white powder.
To remove, you should agitate the surface with a medium-stiff brush and a strong mix of Gtechniq W2 Universal Cleaner Concentrate. And once removed you can reapply making sure that you remove the residue completely (you may need a longer pile microfibre for this task)