Would-be Basquiats at the non-profit Arts Gowanus are digging through piles of wet paper, canvas, and clay as they struggle to clear out their flooded studios that sustained massive water damage during Wednesday’s historic downpour. The artistic organization houses studios for 35 local working craftsmen based in a basement office on President Street near Third Avenue, just blocks from the Gowanus Canal — making the low-lying space ripe for destruction during the flood. “I still haven’t talked to everyone, but for the few people who were there all day cleaning out their studios, it was pretty…