craftgrrl | Getting set-in mud out of sewing fabric?

So-I was in a really bad, really sucky, totally-totalled, car accident last summer, as I'm sure I've mentioned before. I had just gotten back into cross stitching a couple of weeks before the accident, so being the dork that I am, I had some aida fabric and a stitching kit I had purchased at a yard sale in the car. I have only JUST NOW gotten around to going through everything my boyfriend and my parents pulled from the wreckage that used to be a 2004 Hyundai Tiburon, and located this stuff. I had simply assumed that it had gotten destroyed along with the other fabric in the car, like my favorite t-shirt (grrr) and my goddaughter's favorite dress (double grrr)...It didn't, but apparently, it acquired some color from the red Georgia clay into which I wrecked my car...Either that, or the mud, I can't really tell. It looks gross. I have never washed anything before stitching it, and am wondering if I should try with this? There's no smell, just some unsightly staining...I assume that I could cover the edges of the aida with some stopfray and toss it in the wash, but I'm not sure. I mean, I could always use the piece in question for a pattern that had no white background or something of the sort....My major concern is the printed kit pattern. I was making it for a lady that means a lot to me-She's sorta like a second grandma to me. She is, in fact, my best friend's grandma and since we all grew up together (Myself, Caroline, & her sister, Beth), I like to make Momma Betty cross-stitched pieces and/or baked goods now and then...Caroline (my best friend) likes to grow things (like tomatoes and watermelons and the like) and I like to sew things-It's been a family joke for years!

Anywho, I am wondering what you guys would suggest, especially for the kit? I'd love to be able to wash it and finish it, but sadly, I'm afraid that might not be possible. :(

Aida cloth 1:

Aida cloth 2 (close up of the stained area):

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Kit/Pattern 1:

Kit/Pattern 2 (close up):

Kit/Pattern 3 (back of fabric):

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And just because...The wreck that ruined my cloth (and almost killed me):

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Any ideas? I think this is FAR past the magic eraser point, lol...

Thanks in advance!

Cross posted to: