I
Ian
I see, I thought it was maybe a budget issue that there weren't the funds to replace, not that it couldn't be removed. The grinding cup is without doubt the easiest option and not messy if you get a dust extractor for your grinder, other than that, you could remove the highest spots and give it a 3mm or so skim of cement based or glue and screw some 6mm cement board, if there is the depth to play with of course.As I mentioned removing the ply isnt an option unfortunately.