Being totally serious here.

Military models.

When I was younger I loved making model planes and tanks and assorted military models. The most time consuming part of making a cool military model is making it look used and abused. Matte washes, dry brushing, repositioning limbs and melting dents in fenders, bullet holes and oil streaks and all that kind of thing. Best use of "Relic'ing" I can think of.

As far as Music gear goes, I do like the look of yellowed "aged" maple necks. I find the 'new' maple necks just look a bit too clean for my tastes. Although it's worth mentioning all three of my guitars have rosewood fingerboards so....

Amps, well I love the look of lacquered tweed, but I'd rather wear one out myself than pay a LOT extra for the Fender re-issues that come with scratches and dings and water marks from glasses.