yellowing blue tank

[Mike Berrington]

The tank on my 73 Jackpiner has yellowed with age.  It is still the correct blue where the tank strap was and under the decals,  (I just removed).  I can get very nice gloss out of the gel coat by buffing with 2 step buffing compounds, but they do not seem to effect the yellowing.  
My question, is there any way to buff and/or wet sand through the yellowing with out getting into the glass fiber?  I would like to keep the original gel coat and will live with the discoloration if there is not a proven method to removing the yellowing.


Mike Berrington
Waynesboro VA.
73 Jackpiner, 77 GS6 175
88 YZ250,  03 YZ450F