Looks pretty good. Only time will tell on the durability I guess, I’d say good prep is key for sure. My nova didn’t have the best blueing on it and can rust a little easy compared to other shotguns I’ve owned. Not sure if that’s widespread or just mine. If you just used paint not sure how well it’ll hold up with oil and cleaning solvents etc. I’ve had pretty good luck with Duracoat diy on a number of guns, both on metal and composite components. harbor freight or hobby lobby have affordable spray rigs which open up your options for coatings and patterns.
Long story short, If you like it and it lasts long enough then good job.