I use powder coating
This is the companies link to the powder I use.
https://www.prismaticpowders.com/
They have an applicator locator on the site.
If the metal is pitted I suggest using the "Vein" style. The applicator can fill in scratches and such. Works great, low budget, durable and no maintenance.
Good Luck!
P.s. I get all of the metal coated. Makes the table look great!