"I have food in my shield. A wide variety of food. I've been doing this a while."
"I might have rubber. I'm not actually clear on what kinds of objects are and are not genuine rubber." For carbon, apparently she has a diamond.
"Un-geniuine rubber should be fine as long as it behaves rubberishly. Unfortunately, diamonds are not actually the right form of carbon to make carbon plate. I might try burning bread and filtering what's left, but I don't want any fires on my ship. I could make you a metal pressure suit instead, if you don't mind massing over four hundred pounds."
"I can handle four hundred pounds. I'm very strong these days." She has an eraser, for rubber. "Will pencil graphite do?"
"I can always just put them back once you've got the graphite out," she says.
"I'd rather not be attached to you on a personal level, considering you're gonna disappear and I'll never see you again. To mutual benefit." She mimes a toasting gesture.
"Maybe join it up long-ways so it's not easy to snap," she suggests.
"It does dinge my soulgem. But only if I do it a whole lot. ...Hey, can I leave a full grief seed on the moon, see what happens? There's nobody for a witch to hurt there and it could be informative, especially if the evil aliens react."