oil-based paint
actually, from first hand experience, it actually will make you pass a drug test. i get tested once a year and everytime i stop approximately 15 days before the test and i play some basketball to sweat, drink plentttyy of water (do not drink the day of the test because then it will look like you tried to dilude your piss) and smoke 2 black n milds the day of and one about 45 minutes before the test and you will pass like that =) believe me ive done it every year for 3 years and its worked everytime. i even have to go to a toxicology lab. so everyone who says its not possible obviously hasnt tried it and are just basing their info on their beliefs, not experiences.
It will not get rid of THC in 24 hours. If you only have 24 hours then your best bet is to get something that will mask the THC from a test. You can get more information on that on the link below. Also, if you did have more time like almost a week, you could mix some vinegar with a liter of water and drink it every day up until your test. Also drink cranberry juice here and there. But to say it again, vinegar will not get rid of THC in 24 hours...you need something to cover the THC from showing up on your test.