One of my two VF-1A Hikarus shows yellowing, just as Jenius has described (landing gear doors, screw covers, hands). Of course, with my luck, it is the "MIB" one with no stickers applied, while the stickered "display" unit shows no yellowing. Both were bought second-hand here on the board. Haven't noticed any yellowing on any of the other 1/60s (have about 20 of 'em).