Used Rocket Boosters might indeed be excellent building materials for a space colony on the Moon or Mars. It seems we need to hold onto them and take them into space with us if we can. They are strong and made out of great materials and we need such things to use for housing you see?

Lets say the baffling inside was made in such a way that it could have spiral staircases and grate floors in it? Then when you get to the moon you dig a hole and bury it straight down and thus no worries about space radiation and if you buried it upside down the rocket ends would great heat shields doubling as added protection you see. You know I really haven