Rustoleum Noxyde.

Evening all,

I have 2 flaking corrugated roof's to redo.

At the moment they are finished in some red failing paint, reading the destructions PDF it says to blast off the old coating with a 600 bar jetwasher...( got to hire that..)

Any tips on using the coating? initially i thought of spraying it but im bottling it due to over spray, so it looks like i may be brushing it....
Bare bits Pegalink primer?

TIA