Cut a piece of oilcloth to the size of the tabletop, allowing for a 20 cm overhang on all four sides. Cut four strips of matching oilcloth, each 20 cm wide and 40 cm longer than a side of the main piece, to make a “frame” or border to go around the perimeter of the cloth.
Lay two strips, right sides together, one on top of the other, squaring up the corners. On the top strip, draw a 45 degree line in from one corner across the width of the fabric to the opposite edge. Machine-stitch down this line through both strips and cut away the excess fabric, then fold the strips back to create a mitred corner. Repeat, attaching strips to the free ends of the first two strips until all four border strips are joined together to create the frame.
Make a card template of small scallops. Lay it on the outside edge of the frame and trace round it. Cut out the scallops carefully using pinking shears.
With the frame right side up, stitch the beaded trimming to the inside edge of the frame, so that the beads hang towards the scalloped edge.
Fold under a 0.5 cm seam all around the main piece of oilcloth and place it over the frame. From the right side carefully machine-stitch all round the edge of the cloth through the folded seam, the edge of the trimming and the frame.