1) Rigging – Check the wires carefully – I assume you mean the plastic (usually White or (now mostly) black) cover to the shrouds, trap lines or bridal. However – these wires hold either you or the mast up – if there are no frays in the wires but just the plastic is worn away – you are probably ok. Personally I change mine when ever they look questionable.

2) Carmel color – is probably just algae. Fiberglass is porous. You need to clean the boat with something like Zud cleanser (found in any major supermarket. I find it works best). After that – you must wax the boat because the boat is now more porous than before. Be careful not to wax the non-skid.