all done - "fairly" happy with it given it's my first for 4 year.
Had a real issue with the Candy Green - it seemed to melt into the liquid mask, so when I was peeling it off, it was like I was peeling off a really thin Candy Green coloured mask.
live n learm!
now leaving it to dry fully before giving it a backing with a spray can white, then the window masks can come off ready for use on Sunday.