Does using the hydrophobic coating pen affect frames at all? I would assume that it would be particularly bad on the Magnesium frames which seem to be susceptible to sweat/constant water exposure. Is there any risk to lenses at all, long term? ie. change in colour at junction of the frames (which don't have solution applied). Why shouldn't it be used on factory hydrophobic lenses (e.g. goggles)? I assume it's because it would "override" the (better) factory hydrophobic coating.