IMHO, only 2 ways to go.
1-really cheap way to go- scuff the paint with 400 grit wet sandpaper and then rattle can it. It can look pretty good depending on how much time you take sanding the frame, but the paint will always be soft and chip easily. Its pretty straighforward, sand,sand ,sand, degrease, 2-3 coats of paint.
2- have it blasted and powdercoated. Powdercoating leaves an extremely hard finish that is not quite as pretty as a professional job with catalysed automotive paint, but its pretty close. Prices start around $75.
Il faut de l'audace, encore de l'audace, toujours de l'audace
1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1