That's one rule that can't really be played with. If you use an abrasive you'll just cut off your LSP. You won't smooth it, it's much too fragile for that. If you had a *lot* of LSP on there (I've used a mild polish on many layers of KSG) then *maybe* you'd just gum it up, but then you'd just have to polish it *more* to clean the whole mess off.