Hello deaner33
I have a pair of those in Charcoal. My grills are long gone though. You can remove the entire bafle board. It's hard to get out as it has a soft gasket material that sticks very well. Take the woofers out first and be patient pulling it as as it can crack. As far as the cabinet you might want to try something out internally first. It's some kind of thermoset foam/plasic so be careful what kind of solvents you get near them. Same with chemical strippers. Have fun! The look real good in Charcoal if you decide to change the color.
Rob