I wouldn't waste your time with ammonia, I swear that stuffs drinkable, I just spent a few weeks pouring Caustic soda down the seat tube, an over 3mm thick post is now less than 1mm thick and I have been hacking it out with a screw driver and some pliers, will prob finish the job off in the morning light...
Paint is untouched too.
I wouldn't waste your time with ammonia, I swear that stuffs drinkable, I just spent a few weeks pouring Caustic soda down the seat tube, an over 3mm thick post is now less than 1mm thick and I have been hacking it out with a screw driver and some pliers, will prob finish the job off in the morning light...
Paint is untouched too.