Have you tried making a baking soda paste or bleach to see if the stains lift? Might save you the hassle of trying to paint it. For the baking soda paste I think it was mix the powder with a bit of lemon juice to form the paste and let it sit on the stains for like 15-ish mins before wiping it away with a cloth.
merakimela t1_ix7d47b wrote
Reply to HELP: Yellow sun stains on white furniture. by OnTopOfSpaghettiii
Have you tried making a baking soda paste or bleach to see if the stains lift? Might save you the hassle of trying to paint it. For the baking soda paste I think it was mix the powder with a bit of lemon juice to form the paste and let it sit on the stains for like 15-ish mins before wiping it away with a cloth.