I always loved this quote from here: https://www.sheldonbrown.com/stuck-seatposts.html

> To update an old saying, 28 grams of prevention are worth 454 grams of cure.

I have a vague recollection of someone using a cheap old saddle and a rubber mallet to unstick a seat post.

Friends don’t let friends put aluminum posts in steel frames. Especially if those friends ride in the rain instead of wussing out and calling for someone to pick them up.