i would say you would need 1L of 2k black an 1L 2K hardner make sure you give your engine bay a good keying of with some 320 grade sand paper, then give it a prime with some 2k primer when the primer is dry give it a dust coat of satin black. This will show you any imperfections when you flat it down, use 800s wet and dry sand paper. Then give it a good clean down with a damp cloth. When its bone dry time for paint use a tack rag (sticky cloth) you should be able to get these from paint suppliers, removes any dust. when you buy your paint ask for some mixing cups this will make it easier to mix your paint. you should mix your black 2 parts black to one part hardner. hold gun about six inches away from pannel set your air presure at about 45psi over lap each stroke by about a quarter so you don,t get a dry line. give it one coat leave about 10-15mins then re coat.
JOB DONE HOPE IVE BIN SOME HELP AN JUST HAVENT RABBITED ON.