reusing/getting rid of old white wall paint

we have these rests of 5 years old white wall paint, its not dried up yet but it doesn't smell too pleasant (although i think it already smells "cured", it has been worse last year lol) and some kind of bug/worm seems to also have lived in it. the liquid on top is brownish but the paint itself is still white. it says environmental friendly , but i can't read much on the bucket since its either in vietnamese or really faded.
i want to use the buckets so i need to empty them, but the question is what to do with the old paint. i had asked my husband to paint the interior of a storage with it but he says its too old to use. what else could i do with the paint?
one idea i have is to paint the mango trees, they have been here and in bad condition since we moved here.placing compost heaps right next to them has helped somewhat, but in some the bark is also broken. would be using that old paint on the trees be a good idea or could it harm the tree?
as i understand white paint is mostly made up of lime which i guess we have very little in our tropical soil here anyway, so i wonder how to put it to use. add to the compost maybe? just dilute it and spread? or pour it in one place, let it dry up and spread crumbles later?
any suggestions are welcome

My first thought was to paint trees but then wondered...but you say environmentally friendly. I like that. My second idea, if too icky to paint trees with, was to put it on empty paper feed sacks to dry out, like what horse and goat feed comes in.

Stinky paint is on its way out. You can still make use of it, but time is growing short. In a few months it will get funky, reek, and start to solidify.
Got any fence or exposed lumber? If all you did was freshen up a henhouse you can add life to the wood and use up the paint.

If you are just looking to dispose of it, the guy at our local landfill said to pour it on an old piece of carpet, let it dry a bit, then roll it up and take it to the dump. Or maybe he did not say that, if his boss says he can't say that then I am sure he did not say that.

thank you everyone for your replies and suggestions . i ended up painting some concrete posts with that paint and i did throw on and around a compost pile whatever i scratched out of the bucket while cleaning it for the chicken. now after some weeks it appears those solidified last rests of paint have disappeared o.o. i wonder how nature ingested them so fast.
i guess the best use for old paint is always painting something, because i see corners that i could have painted as well everywhere haha!