Hey gang, I removed the seat from my 54 1/2 ton and noticed that there is a hardened coating brushed onto the inside rear of the cab. Is this some form of undercoating? It looks original or at least very old. I will want to re-paint the interior next spring and am wondering what to do about this "stuff". The cab has very little rust so it will be an on-frame re-paint inside and out. Your thoughts??

Bruce (I love My Truck) Miller

1954 5 Window 3100 Chevy Pickup - Driver
1929 **** Model A Pickup - Restoration