Still haven't found one that blows my socks off OTC.Billet by mothers is ok but very hard to find even down here in saturated south fla.The best products are going to be at a peterbuilt Mack or international dealership and service dept.They have what you need and will blow your socks off.Zephyr is pretty good by hand machine polish I use the rouges bricks and felt pads for awesome results.