I did consider 2K paints, which should give a harder finish and stand up better to solvents, but they have some disadvantages.  They're 2-component paints where a hardener is mixed with a base.  They are available in aerosols, but once activated they have to be used up in a fairly short timescale.  Also I believe some of the ingredients are more toxic than in 1K paints, and I don't have proper spray facilities.

I'd suggest doing some tests with what is available in your area, and satisfy yourself that the products & process are satisfactory for what you want

The Dingo is mostly built from 6061 aluminium alloy, which has very good corrosion resistance. Some important parts, however, are made from 2024 which is a lot stronger but less resistant to corrosion. Those parts have to be painted. I wasn't looking forward to doing this, because in the (distant) past I never had much success in painting aluminium. The old paint never seemed to stick very well. I need not have worried, because with modern etch primers it's much easier. The paint itself contains an acid which microscopically etches the surface, so the paint gets a very good grip on it. It also comes in an aerosol so you can get a smooth finish. You still have to degrease thoroughly and it helps to key the surface with a Scotchbrite pad. I don't have a spray booth or extraction facilities, so I improvised with a ladder and a length of dowel outside... The parts in the pictures are the only bits needing painting for the elevator. I masked over the bearing for the pin (connecting the elevator to the fin) so I didn't get spray paint in it. The paint dries quickly, but I'm going to leave it to harden well tomorrow and start assembling the elevator on Thursday.