I have been reapolsterting my Boat (an '87 Berretta - yes I know not the best boat but she is my first boat) and I have had to rebuild the wooden cover for the engine. I have used 1/2 cdx with a poly-fibergalss resin to seal the plywood. But I noticed that the orginal cover was glassed on the inside and what looks to be sprayed black. Is this blck material a fire retardant? If so, can anyone tell me where I might find such a product. While on the topic, is it worth it to install an insulation to help reduce noise? Thanks for any help with this.