Whatever the paint you use, the trick is to always cover it with automotive clear varnish.
First, contact the maker to get the reference of the color used. For instance, Gong red is RAL 3020 (there are different color catalogues: Pantone, BS, NCS, RAL, AFNOR, NS, ...)
Get automobile / boat paints in the desired colors (in France I use
www.bleu-distri.com/), and a clear UV-resistant varnish. Either spray bombs or touch-up pens (I use both). Do not use masking tape with spray cans to avoid seeing the transition between the old & new parts. Mask only pinlines, logo, non-painted (bamboo) zones, pads... For touch up pens, if you leave brush marks, sand lightly the paint once dry
Use many thin layers rather than thick ones.
To smooth paint chips, I now just do a "mini hot coat" before painting: just prepare a tiny bit of epoxy resin, and apply it on the chip with your gloved finger, stretching it as thin as possible
