I'm building a DIY power supply using 6 server power supplies. I've been looking for a case/enclosure to hold them and the necessary wiring and came across a styrofoam cooler that's the perfect size called the Chill Chest (https://www.amazon.com/dp/B07874GXQ5/ref=cm_sw_r_cp_apa_i_xnK4CbE96SDPC). Is this okay to use for this project or is static electricity a problem even if there's nothing constantly physically rubbing to generate it? If the latter, to eliminate static electricity can I cover the interior with a none conductive material like rubber (maybe spray it with a spray rubber like Plasti Dip?)?
P.S. - Of course I would cut holes for fans and ventilation.