Ok thanks. I'll check a plastic out as I've still got over 80sqm of wall to go and probably a ceiling so it'll have plenty of time to pay for itself.
I invested in a 14" pre-worn Marshalltown this time. It's working great. I was aware of the difficulty of using a brand new trowel from years ago - left the wall looking like a rail yard!
My favourite part of the job is breaking the sockets back out cos at that point I'm about 20mins away from swilling a congratulatory IPA in my local. For each wall I complete, I get about 2 beer tokens from the Wife