Repairing an aluminium prop
Having dinged the prop on my Mariner 15 2 stroke (well, having had it dinged by my 8 year old son, but he's still learning, so that's OK), I did a repair job, but not quite as successfully as hoped.
I filed off all the rough bits, leaving a nice clean edge, making sure to do the same thing to each of the three blades, so it remains balanced. Then, simply a paint job to get it as good as new. I used some Hammerite "special metals primer", designed for aluminium among others, and some gloss enamel paint to finish. Looked good as new before it went in the water yesterday.
But now, quite a bit of the paint and primer has peeled off, just as someone warned me, it's tricky to get the paint to stay on aluminium.
So, any tips on better paint stickage? Is there any harm in leaving exposed metal? (The engine is stored dry, not in the water.)