Bit of a strange topic, I know. I'm planning on a bit of travelling this summer. My gear is all insured so this isn't life or death, but I'd like to make my shiny red ring lenses a little less attractive. So I thought 'hey, why not [carefully] cover them in gaffer tape?' ... Opinions? The main thing I'd like to avoid is leaving a sticky residue on the lenses, but I'm told gaffer tape is designed to avoid this. I hope I don't sound like a madman here. 