Seized seatpost - help!

TBJ
TBJ Posts: 10
edited March 2008 in Workshop
My carbon (Easton EC-70) seatpost is well and truly stuck to my aluminium frame. My LBC have had a go at it with percussive maintenance but are afraid of inflicting terminal damage.

Any suggestions welcome - e.g. is there anything which can be used to weaken the chemical bond between the carbon and the aluminium that won't end up with a broken seatpost stuck down the tube?

Cheers