
Originally Posted by
LBCrew
If there's a lot of space to fill, use filler/resin mix. If it's shallow, spackle. If it's a corner, I'm tempted to say the former is the way to go. Spackle's better on the flats or along a straight section of rail, and it's to fill the foam only. Q-cell is easily available, and adds strength, but is harder to sand. For reducing weight, ease of sanding, and in areas where strength is not an issue, a better filler material is microballoons... but you'll most likely have to order them from a supplier. Tape around the area to form a "cup" and fill the cup with the thick resin/filler mix. When it's at the hard rubber stage, just before it's fully cured, surform, then sand to the desired shape. Two layers of cloth overlapping onto the roughed up surface around the ding. fair the edges, hotcoat, sand, polish.