What is the surface? Wood? Is it grainy?
I have had good luck taking brown furniture and painting it white. Just sand, scotch brite, paint thinner for de-oiling and then prime / paint with a brush. Same on brown door frames when throwing the brown door out for a white 6 panel replacement, keeping the frame. A good paint will flow to where no brush marks are seen. I would not eff with a sprayer.
AAMOF I am planning a bathroom refresh with a brown vanity that will get this treatment. I'll report back!
G