Check the listing for details. Q-cell Ding Repair Filler Powder. Condition: New. Listed at 11.04 USD. Q-cell Ding Repair Filler Powder Inorganic hollow spheres added to polyester or epoxy resins for a lightweight filler for fixing surfboard ding holes. When cured, the Q-cell and resin mixture is bright white, sands easily, and provides additional strength to the ding repair. Once the Q-cell ding is filled and sanded you can laminate a patch of fiberglass and hotcoat to finish the ding repair. There is no absolute measurement of how much Q-cell to add to resin, it's a personal choice and depends on the type of ding, how deep it is, and where it is (need thicker mixture on the rail for example). We recommend mixing Q-cell into resin and adding more until it is a consistency like mayonnaise. For best results mix your hardener or MEKP catalyst into the resin before adding the Q-cells to ensure proper resin cure. Color: White Available in 2 different volume quantities 32 fl oz. tub 2.5 QT tub