Hi all. It's been a wonderful summer (in a terrible year in our country) sailing on my 4 year old fish on the bay three or four times a week. My bay is very shallow at times and I have tarnished the wood boards a bit due to dragging them through the sand. Wondering if anyone can recommend a sanding and varnishing technique (for dummies please) that can keep me dreaming of next summer's sunfish joys. Thanks in advance.