A quote I heard a while back. "Painting is easy until you know how".
Anyway I paint over 1000 baits a year I started out with regular spray paint you can can off the shelf. It works you can have fun. Then you start learning thing... And it isn't as easy.
The question u need to ask your self is how far do u take the painting. Spray paint is pretty cheap but you will get like 10 colors and have $50 in them. Then you drop $100 for an airbrush and nother $100 on paint then a compressor then a vent hood and next your etexing baits but first you need a drying wheel... Before you know it you want to make your own bait and then you do make your own and catch fish on it. Next your selling a few and people catch on and you get a sale tax ID and federal excise code, insurance dealing with non paying tackle shops... It's a slippery slope.
My suggestion is think about how far you want to go. Air brush and compressir is a lot of fun but rattle can are cheap.
I started playing with paints then what i wrote above happened I love it I enjoy it but think of your budget for time and money. Most importantly have fun doing it.
Few years back while talking to another bait maker I asked the question "been fishing?" He replied " no making to many baits for everyone else to go fishing"
Also. If you do ever start making bait be sure to have the sales tax id and excise tax id you get busted with out those the state and fed will climb all up in your business. It isn't worth it to try to fly under the radar. I heard stories from friends who been pinched. It your other bait maker who will turn you in