To answer the particulars question it is a 68 built in dearorn July of 68. I already did the seams with modern seam sealer prior to paint. Yes the car is painted and getting ready for final assembly. Maybe no reason to do the interior with the tar based product but thought I'd do it for authenticity. Now the trunk is seen and that's where I would really want it to look the part. However spraying at this time would be risky. Lights, wiring, gas tank etc are in. Any thoughts?