Key:
First-up everything got a good keying with a #400 grit sanding block. Aluminium is notoriously hard to get paint to stick to so this step is essential. Everything was then cleaned/degreased using cheepy (£1 a can) choke and carb cleaner.
Prime:
Priming was done with 1K etch primer, which actually bonds with the substrate material. Two coats on everything.
Paint:
Holts acrylic satin black goes on next. I usually try to get 4 coats on in all, starting with two very light ones with a fair-old buildup on the last. I messed up here because the long rails stuck to the paper, and one top sideplate flipped over as I tried to move it. Basically the choices are do it on paper, which minimises the amount of overspray getting into the atmosphere, or hang them up. I opted for the first, and as long as you move things about quite rapidly before the paint dries you can usually get away with it. Last thick coats are the worst to do. Never mind. The insides of the rails got plenty. Problem is I ran out of satin, now I've only got matt. Oh well - mix and match!
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