Only Powder coat will begin to last and even that wears through after a while , with constant abrasion ,
from Pannier hooks .. then it has to be blasted off and redone.
I have a red Powder coated Blackburn Low rider set somewhere (not in Use) .
nothing will be permanent, but impermanence ..
take a simple route wash it with acetone to make it clean and oil free ,
rattle can it , then touch up chips thru the paint as they arise.