Ive rattlecanned a few frames. Laquer is real shiney & dries quick. You can get it at car parts stores. But it scratches easy.
PJ1 is good can paint if you can find it. But it dulls, and isnt ALL that better than laquer.
I did my main bike 100k ago & it looks it.
Now, you can get setups at the parts store & automotive paint stores that are pressure cans, not very big, that thread into glass jars. You can then spray auntomotive finish, but its pricey, like $30/qt. Maybe you can get half a qt- 4x more than you need-from a automotive paint shop.
Ive painted whole bikes that way- you can add "wet look" hardener, etc. Insanely poisonous, wear a respirator.
Whatever you use, let it dry real well, & topcoat it with clear. The two part is crazy expensive, the one part rattlecan not proof to gas. But you can always touch it up- if you can see t you can paint it.
Temp. is important. If its really cool & damp. put it off.