It gave me nightmares for about a year. Time to read again I think.

No the purpose of the white pant was to help keep the external tank cool to reduce fuel boil off. The foam insulation was incredibly rough, not something a thin layer of paint could smooth over.

( ͡° ͜ʖ ͡°)

You can also tell a claystone from a siltstone by rubbing it against your teeth! If it rubs smoothly without friction then it’s a claystone. If it feels abrasive then it’s a siltstone.