Then find something to cover them until you can take them off and do it right. Like split a Frisbee in half and glue it over the foot, or maybe something fancier. Find four of something round at the local junk shop.... Please note that I will have to leave the legs on when cleaning them up. I'm not taking them off the table at this point.
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If you really have to do it in place, put a support under the frame at the leg, jack it up very slightly, spin the foot up and then put a plastic trash bag under the foot while you work on it. Before you spin the foot up note the orientation and make sure you spin it down to exactly the same place it started.