Sounds like a good idea. I have some in my garage now. Bought it last year to use on our Nova. Never thought about trying it on the hood of our 53. Would still have to fill the seam in though? Never had our hood apart to see how much of a seam there is ? Let us know if you try it!

https://sites.google.com/site/bluejaygarage/home
53 half ton http://s159.photobucket.com/user/sworden73/library/?sort=3&start=all&page=1
72 Nova SS sold
75 Corvette
52 Chevy Styleline Coupe