WELL,I THINK A TRUCK LINER WILL BE BEST.IF YOU WORRY ABOUT CONTRAST YOU CAN ADD COLOR TO THIS PRODUCT TO MATCH PAINT ON CAR CLOSE BUT NOT EXACT.IT IS VERY DURABLE AND ACTS AS A SOUND DEADNER.IT ALSO SEALS THE AIR,MOISTER,SALT ETC.WHICH MEANS
NO RUST.I'M GOING TO DO MY 69 CAMARO IN LINE-X.FROM BOTTOM FIREWALL WERE IT BENDS TO THE REAR TAIL PAN.THE FRAME,FRONT SUSPENSION,REAR END AND 4 LINK IS POWDER COATED.FRAME TIES AND REAR FRAME RAIL ARE IN POR15.