I would like to add that if you pick powder coating, u get what u paid for. A 350 bucks PC job will be way better than a 50 bucks one.

Who knows what primer the guy used but you can get car paint in a can for about 15 bucks. Single stage paint so you wont even need clear. As for the blending well it depends of the color and how good are you with the spray can. If the color is the right one the blending will come up almost by itself.

To remove the paint and sandblast it I know over here at least the painters ask like 60 bucks more. If you have some rust the sandblasting will take care of that.

Wet car paint, can go for 150 to 600 bucks. A good PC job is around 300. For the record eventho PC is famous for being tough, if a wet paint job is done right it can be equally tough than a PC paint job.

U can strip the paint with paint remover but I would use rattle can to paint the bike, u have to use car paint or powder coating, rattle can sucks.

Good luck