Don't know if you did the epoxy pour yet. What most of us do is apply a good wide painters tape to the underside. Still lay down plastic incase of any drips. You cannot get the epoxy off the floor easily if it drips to the floor.
Here's a some pics of a tabletop, countertop and bench we did a epoxy pour at a resort near us. All had painters tape on the underside before the pour. If you use a paints tape that does not stick very well, the epoxy will seep though. so, keep a eye on the underside during the pour, just in case.
The lower pic was one pour. The top three pics we did more than one pour. 1st was a light thin pour to fill any voids and help seal and we removed any bubbles that came up, Then did another pour. With the second pour, we did not have to chase as many bubbles. We did a light scuff sanding between coats.
This countertop epoxy pour we did not use painters tape. Because all was sealed.
Here's a some pics of a tabletop, countertop and bench we did a epoxy pour at a resort near us. All had painters tape on the underside before the pour. If you use a paints tape that does not stick very well, the epoxy will seep though. so, keep a eye on the underside during the pour, just in case.
The lower pic was one pour. The top three pics we did more than one pour. 1st was a light thin pour to fill any voids and help seal and we removed any bubbles that came up, Then did another pour. With the second pour, we did not have to chase as many bubbles. We did a light scuff sanding between coats.
This countertop epoxy pour we did not use painters tape. Because all was sealed.