I was cleaning some Sepele window and door frames ahead of giving them a recoat of "Osmo 420 clear uv protection oil", and I've just gone out to look at them this morning to see that the sugar soap has left a black stain on the finish. I feel like a bit of an ***** because I used sugar soap specifically so it didn't use a resident or stain.
Is this a known issue and if there a solution to getting rid of these stains?
Thanks in advance
Is this a known issue and if there a solution to getting rid of these stains?
Thanks in advance