Help... seat post is stuck!!!

[Queen of Skulls]

I am finally putting my vb-218 build together  and besides having to redo the front hanger because of bad rivets and no epoxy....(I swear this is the most pain in the butt build...)

Any way I was testing out seat height.. well its slipped down a 1cm and is now stuck...  to be honest It was mostly in there already because of my short legs. and long torso and xl frame(only way I can fit bikes) biggest reach/ top tube for long torso and arms and a slammed seat post for my short legs... now its too slammed!

Any ways How do I get it out??? I tried a soft rubber mallet and pulling and twisting... its just slightly moving forward and back like 0.5 to 1 mm..

what other tricks can I try?

[ZacItaly15]

spray some isopropil alcool that is very volatile and does not affect the material but may make smoother the extraction
Look if the liquid penetrate up to the bottom bracket

I suppose there is some reduction of diameter in the molding.
Hammer two times up, and one time down in order to avoid dragging of chips

[Serge_K]

I feel like youtube will have the best suggestions for this.
i would say WD40, because it can't hurt. But you will have to thoroughly clean it afterwards.
Rubber mallet, wiggle wiggle. if you have a woodworking clamp and you can get to widen, it could help apply pressure in the right vertical axis.

[Sebastian]

Lube it. Wd40 or anything else that penetrates.
Put an old saddle on that seatpost. Turn the whole thing upside down and step on that saddle. Now pull on that frame like a motherf#%$er!

If that doesn’t help, I dunno what will. Maybe some more lube.