I'll wire wheel whatever I can before applying it.
I have this rust converter/primer in one but it peeled off when I did a Victa cowl with it, so haven't used it since.
I got two cans of the red primer for $5 each on clearance from a Sydney Tools or Total Tools outlet -forget which.

It's done well on a Victa utility flap so far.


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!