The green pickguard on my Fender Japan '62 reissue looked too green to me, so I used the Kiwi brown shoe polish trick to give it a very slightly aged look. Everything else on the guitar looks essentially new, so a heavy relic'ing would look weird. I wanted it to look like the guitar has been played very little in the last 40 years, just if the plastic has turned.
Came out excellent, I think. Wiped it on, wiped it off immediately. Rubbed with a little naptha. Repeated the process several more times. Did it just a TOUCH on the parchment pickup covers + knobs + switch tip (bought from Callaham, along with the bridge assy).
Here are a couple pics in normal and dim lighting:
http://www.kurtsequipment.com/62strat/62strat13.jpg
http://www.kurtsequipment.com/62strat/62strat10.jpg
more pics can be found here, including pics of the new guts, for anyone interested:
http://www.kurtsequipment.com/62strat/
With all the mods (not counting the Fralin pickups), the guitar still cost less than a used US 62 reissue.