getting my first gig

I hinted to my local comic shop owner that I would love to be a dressed up hero at Free Comic Book Day in May and she asked if I'd be a volunteer! I will be in my green & yellow Rogue attire (and back-breaking boots). Since hair extensions are so expensive I'm going to start looking into temporary wash-out colorings. The clip-in extensions I got will be great for the white stripe but I would need to darken the rest of my hair up by a couple of shades. I would also love to find knee pads that actually fit since the I ones I got (dirt cheap) at Home Depot are huge.