[quote name='dlloyd' timestamp='1375866312' post='2166551']
This would certainly work to yellow it, as well as the plastic fittings (pickguard and knobs)
Yellowing is the bane of another, slightly sadder hobby that I used to have (honestly, used to), collecting Star Wars action figures. Original 70s/80s figures are often badly discoloured, particularly those with white plastic parts such as Stormtroopers. The UV in sunlight is the main culprit.
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Top tip - conservatory cleaner restores the whiteness