Sacreligious , Graham if you were a boater you would have known Zinc Chromate or Zink Phospate is the best primer to use. No rust will come through ever !!.
Nice finish on the wheels though. Guess i have the best of both worlds I'm a Fisherman /Boater and I have all the tools to repair or rebuild anything i own. Not a bad feeling at all. You may be a little easy on the financing though. As all of us know "Boat" stands for "Break out another Thousand".
Thanks
@Old Mud. You have triggered a little recall. I have had a "new old stock" 1L can of Zinc Chromate primer rescued unused from an aircraft spar repair operation, stashed in the garage. I don't think this inorganic stuff can change ? I am hoping there is no deterioration. Chemical theory based, I am guessing it's OK. It is pale greenish stuff that seems to take a long time to dry.
BUT - is that not intended for Aluminum surfaces (as in airframes)?
Given you said the word "rust", I am thinking your boating experience of laying on Zinc Chromate includes on iron and steel.
Re: Rust
From actual cleanup experience, if you use a steam cleaner to shift the grime, or use any kind of acid, helped along by electrolysis in any way, the instant the surface slightly dries, and sees oxygen, it turns orange in about 15 seconds. The first rust cannot be stopped. The future rust stopped only by denying oxygen by coatings, paint, whatever. You can convert the surface to magnetite, and inhibit it that way - or convert established rust.
I found sticking it immediately into something caustic, or even rubbing wet soap on it, anything to neutralize the stuff, does work. So now, I use simple washing soda for the whole process. Heat in alkali, and it makes something darker on the surface, but rust is stopped dead. Then paint it.
You can use electrolysis in washing soda (Sodium Carbonate) to de-rust, and it is cleaner if you make the other electrode carbon instead of old rebar, and it is self-limiting. When it runs out of rust to convert, it ends up making Hydrogen and Oxygen. It cannot chew down, nor modify the dimensions of the metal.
I follow your lead here in the elements naming protocol. I guess we are supposed to use capital letter names for elements which, because they are (elements) get the honoured spot in the Table Periodic.
Right-on that B.O.A.T. cranks up in $$Thousands. Posts #1, #2, #3 would have had it "Standing in a cold shower, tearing up Jacksons". Hmm - given inflation and all - better make that "Grants" (I think).
I still consider
@Martin W tears up the coolest-sounding "Mackenzie Kings".
Edit: P.S I am told by my son that real elements do not get a proper name capitalization unless they are the "me too" sort beloved of cosmetic companies who will dream up names ending in "ium". This for their worthless, but expensively packaged crap to lend it an aura that it might really be associated with a scientific truth! The symbols however, are definitely capitals, or start with capitals.