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There have been threads on here about rattle can frame resprays.
They look great when fresh, how have they survived a year’s abuse?
What paint did you use?
Not an answer, so sorry but I've just sprayed my Sprinter wheels using Montana Metallic spray paint and it was very easy to use and get a nice even coverage.
I used their primer too.
It's not metallic like a car is but it's nicer than flat.
I'll let you know in a year if it lasted.
There's a great hand painted VW group on Facebook
Last time I did a rattle can job was on some forks about 10years ago, bought quality paints and lacquer for about £50 (which STW thought was silly cost). Kept the bike for a year and had no issues at all.
I did spend a loooonngg time on the paint job though about 2hrs a day over the course of a week. Fine sanding between light coats of paint etc. If you do a 'sam pilgrim' quick job in an afternoon expect it to fall / chip off.
So far so good TBH. Resprayed a steel road bike two years ago - took a fair while with prep, but as it was a metallic pearlescent white it took a good deal of primer that had to be perfect for the pearlescent to show well as it's near translucent. Still looks great, but the paint took quite a while to harden.
Also resprayed my old MTB in December - that's my daily commuter, but I used a gunmetal colour spray paint that didn't need all the prep. This resulted in a thinner coat that's dried well. Also, if I do scratch it up, it's no big deal to repaint a whole tube.
Halfords rattle tins - the white bike was quite expensive to do, the 'grey' one much less so.
I did my Roadtat with Spray.bike stuff, and it turned out nice, I made lots of mistakes but that was me, not the paint
Oldshovel on youtune is a good example of what you can do with their stuff

I used spraybike on my daughters bike a few years ago and stood up pretty well to kids stuff...
I’ve sprayed a couple of bikes, one i did very little prep, looked ok at first, but looked rough fairly quickly.
Other i did spend the time prepping, with help from a friend who was easily good enough to be a professional sprayer, and that one still looked good 5+ years later.
It’s all about the prep.
As well as sanding coats as part of prep work, two things I find help are: using panel wipe/tack cloths to remove contaminants and spraying in a warm environment (even heating up the parts too)
I managed to do both mine in winter, but make sure you store the paint in the house, and warm the frame up. Ideally you'd spray in warm months. I'm usually off work for two weeks at Christmas, so it was something 'to do'.