I watched a video recently about using UV curing adhesive to attach copper foil to glass. The creator warned against using alcohol or acetone on the copper, as any liquid of that type that reached the UV adhesive would cause it to degrade and eventually fail.

You have many choices. Isopropyl alcohol of various concentrations, higher is better, denatured alcohol and acetone. Other solvents may work, but these are relatively safe. Use in a well ventilated area and/or enclosed container to avoid igniting and inhaling fumes.

You could save on quantity by building a set of dams around the screw openings with modeling clay, perhaps include two or three in a trough. Once filled, drape food sealing plastic over it to reduce evaporation. You could do each hole individually, but it would reduce the volume at the expense of a more concentrated solution as the resin dissolves. You'd want to compromise by having a bit more alcohol in which the resin can better disperse while it's working.

Alternatively, just dump a bunch in a tray to cover the bottom of the vat externally and cover the tray. Food (sandwich size) containers are handy for this.