I've spary painted the stock of my remington 597 a couple times.
took stock off cleaned it really well, scuffed it slightly painted a base coat, after that dried I painted over the top of it with a different contrasting color and wrapped it in plastic wrap (not neatly on purpose), after about 30 seconds I unwrapped it carefully and hung it to dry.
It looked pretty neat for about 5 years until it started wearing through and scratching off from use.