Hi BB & Mf
Definately etch primer the ally, the guy at UltraColor told me it was recommended. Just for curiosity if you pick up some paint can you report back the batch number? BB and I have the same batch guessing it will all be the same.
Good old Waltons, my mum worked for the department store in the city head office was her first job and always talks about it, she still has her Waltons name badge. She would love that mower.
As for the Ultracolor Hammer deep green, BB is correct while it seems dry after days even a week, don't put any pressure on the paint as you will disfigure the finish, I did the same thing after assembling the clutch and sitting all the weight on one end. Guessing the silicon takes a while to harden up, but in saying that my catcher soleplate and grass deflector is still holding up after a few months of mowing.
B_S