I'm working to refurbish the interior skeleton and trunk in my '63 Fury. I've spent hours on prepping it removing old tar coating. What a job and only have left quarter near prep for coating so far! I have some areas in the section prepped that are appreciably surface rusted and clean sections of metal. After some hours of web surfing have come across some products that look good to use: base primer coat of Rustoleum Metal Primer; but treating only the rusty areas with Extend first. Extend says don't use this on clean metal or apply a non-oil base coat over it...thus the Rustoleum pick. After this looking to apply a sound/waterproofing overcoat coming across two interesting products 1) Acoust-X and 2) MacMaster-Carr Rubber coat #7873T4. Lizard Skin is popular but part of my selection is all coatings need to be brushed/rolled, on not sprayed, as I have to control where I apply it. Before I can finish this chore the car will be painted. Anyone use any of these primer or coating products; if so appreciate hearing your experience. Thanks.