@ Croqueteer. Domestic oil-paint is the worst of all worlds for painting an aircraft.....If you want an air-drying (as opposed to chemically curing) paint, use Transport polyurethane, AKA "Coach-enamel" warm it to thin it , spray or brush...super gloss, lower shrinkage than dulux, quicker tacking to "dust-dry" quicker hardening , tougher and less shrinkage. any automotive paint supplier will be able to colour-match
exactly as well as supplying the correct thinner, primer etc. to give you the best-protecting, most durable finish.
I have ,myself , sprayed domestic radiators with thinned, warm Dulux...excellent finish but a bugger to handle until hardened.
much better to paint the inaccessible portion only, then fit and commission.....spray/roller/brush the acessible bits when it's cooling down....too hot and it will have a dull surface spoiled by "solvent-pop" or a brush will tend to stick.....get it warm enough and all brushmarks will flow out, leave for a couple of hours and then turn up the heat and it will bake itself
