If you want to write on photograph contact sheets and I'm looking for a type of neon or pen that will show up very nicely on my black (exposed) resin coated paper. Any suggestions?

Metallic silver or gold sharpies are amazing for this purpose. They work on pretty much any surface and show up perfectly on black. You can buy them wherever. Here is a link to Staples: http://www.staples.com/office/supplies/p1_Permanent-Markers_99812_Business_Supplies_10051_SEARCH