Good afternoon. I have at least 3 Litres left of a water based Cabots Aqua Deck wood stain, left over over from staining my deck recently. I need to stain my high retaining wall next and am in the process of giving it a good clean, but I am looking for a darker see through colour. Is it possible to tint my merbau tinted stain with a small amount of black? Sorry about the poor photo of 'dirty' retaining wall, but you get the drift.
By the way, I read in one of the posts here that you can add some Rit dye to the stain to get the effect. Is that possible?

