Did mine on the '35....used Permatex ' Right-Stuff '. It applies like silicone, but it is not. It's more of a 'rubberize' material. It gives you lots of time to work...contact cement is a do or die, and if placed incorrectly, you are done. I started with the outer lip, nicely tucked in place, clamped to fit and waited one day. It takes about a day for this ‘Stuff’ to cure. The following day, I did the remainder of the board. The nice part about this product is that it is black and when cured, feels 100% like rubber. Do not apply too much, roll with a wooded roller, it will ooze out of the holes on the metal boards. It’s a win / win situation…..and does it hold….oh yea! I cannot build a car without this product….oh yea, also great for sealing those head studs in the block…..this was confirmed on another post. If your auto parts store does not carry it, they can order for you, after all, it is a ‘Permatex’ standard product. It now comes in a tube, caulking gun style…..not cheap…just super good.
PS...sticks to paint or anything else. Robert