If your buddy is going to repaint the bumper for you, I would just worry about getting the paint off of your bumper. Don't really worry about finish sanding it as your painter freind will most likely want to get the surface to smooth out with a few coats of primer and some light sanding in between. I would use 80-100 grit to sand off the paint. The chemical bumper strippers out there are for stripping Urethane bumpers, the bumpers on the Contour/Mystiques are made of ABS plastic. Urethane swells when the stripper gets on(goes away after the stripper is removed) versus the plastic that starts to melt and fall apart (gets really brittle too)  . Sanding as long as you don't dig into the plastic alot is the safe way to go. You might want to sand a little heavy where the spider cracks are just to remove them from the plastic otherwise they WILL come back through your new paint after it dries.
95 Contour, Custom EVO bodykit, 2.0l, PNP Focus head, Stage 2 cams, Je pistons, Eagle rods, 4in1header, 2.5" header back exhaust(complete stainless), D P nitrous, ram air intake, 10mm wires, flamethrower.
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