Originally Posted by
halfspeed
Somebody did something like that on C&V a few years ago. No carbon, but lots of reasonably light aluminum parts. Got it under 30lbs and seemed a bit disappointed it wasn't lighter.
Acid bath the frame to reduce the wall thickness, then wash out with alkaline solution.
Don't laugh (at least too much).
A race car champion back in the 70s was so determined to win a championship, he carefully had all the panels on the vehicle acid-bathed to reduce their weight (substantially). And he won (and the car was a very smart presentation in and of itself).