Originally Posted by
praveenjay
For the stuck seat post and stem I used WD-40's new 'Specialist Super Dégrippant' (its in french) that was recommended by my LBS.
Sprayed this for " days and let it sit and soak.
FYI. One of the best penetrants I know is a 50/50 mix of Acetone and ATF (automatic transmission fluid), this will loosen nearly anything…..but be careful of any paint you might want to keep….a last resort before heat!