How do I remove epoxy drips from under the edge of my table?

Drips are normal. As the flood coat flows over the sides it wraps 1/4 to 1/2 inch underneath and hardens into drips or icicles. Let the piece cure at least 3 days (72 hours), then sand them flat with a sanding block or power sander, no grit requirement, and wipe with acetone.

If the top was resting directly on the plastic instead of raised off it, the runoff can spread into flat sheets along the bottom edge. Sand those off the same way; scoring thick sheets with a utility knife first helps control removal and prevents chipping.

Sanding marks underneath need no further treatment; they are out of sight. If they do show, for example on a piece you can see through, either scuff the area with 220 to 320 grit, clean it with denatured alcohol or acetone, and brush on a thin coat of epoxy (a heat gun smooths the brush strokes), or polish it with a high-gloss compound such as 3M Finesse-it II. Polishing takes practice; too much speed smears the epoxy and too little leaves it cloudy, so test a small spot first.

The underside itself doesn't get epoxy. Leave it unfinished, or seal it with any oil-based polyurethane.

For a second coat on top, pour within 4 to 10 hours and no sanding is needed. Past 10 hours, scuff with 220 to 320 grit and clean with denatured alcohol or acetone, never paint thinner or mineral spirits.

Instructions: https://cdn.shopify.com/s/files/1/0320/7168/0140/files/Epoxy-Instructions.pdf?v=1616443869