Hi. I want lay subway tiles over a previously painted besser brick wall in my laundry. My question is about how to prepare the wall. I assume the paint will need to be stripped back before I put any tile adhesive on the bricks. What would be the best method to do this and clearly I can't get the paint out of all the little holes in the besser brick surface. How far do I need to go? Do I need to remove the paint at all? Also what would be the best tile adhesive at bunnings to use?