how old is the paint unless you added water to the mix before you put away its not lighty to go off that quick
i had some paint in the garage been there 6 years mixed up smelled a bit but went on allright
i normaly mix 15 percent water in paint now to make it go fartherbut only mix what i use or i throw it
i had to do a bit of touching up of the paint did not want to mix up any more so just used it it lost the smell after a few days as fresh paint does when you paint the smell i believe is in the gone off water once that evaporates should be fine