There are three methods for quickly removing the paint. One is with the use of commercial chemicals like Klean-Strip. Seconds is by using a grinding disc on an angle grinder you can quickly strip off all the paint from the base material. For this, you need to have a proper grinding disc whose diameter matches perfectly with the size of the grinder. Third is by using some common household tips like if the metal is small, dip it in boiling water, all the paint will be removed quickly. Or you can apply a paste of baking soda and vinegar on the culprit metal.