I usually prime and paint the hood, same color parts, and body at the same time and have them mounted on a board so I don't apply more coats to a single part. Every now an then you can get a reaction with the plastic and things go bad. I can't see your picture to well but it looks like the paint on the hood fogged from humidity or reacted with the plastic.
Your Edsel is a very nice build. The motor is almost totally incorrect for an Edsel. Only your valve covers and air cleaner are correct for 1958. Lack of a distributor up front is the big give away. The rest of the motor is a Y-block which wouldn't be offered until 1959 as the base V-8 motor. In 1958 the base V-8 motor was the E-400 (400 Ft lbs Torque) 361 Cubic Inch FE (Ford Edsel) big block. The E-475 (475 Ft lbs Torque) was the top of the line V-8 and it was a 410 Cubic Inch MEL (Mercury Edsel Lincoln) big block.
Cable prices went from ridiculous to stupid several years ago. I dropped my subscription and haven't missed any of those shows. I used to like watching the BBC's Top Gear guys before Jeremy completely lost his mind.
Those V-6s were basically racing Chevy small blacks with the rear cylinders lopped off. That's why the right rear and left front exhaust ports are close together like the center ports on a small block Chevy. Pistons, rods, valvetrain,etc., everything but the crank, cam, heads, intake, block, etc interchange. Made pretty good power and were reasonably reliable.
Compared to most of you guys, I really am cheap. I try never to pay more than 20 bucks for any 1/24 - 1/25 kit that is in current issue and with a Hobby Lobby discount coupon, much less. I buy bargains off of eBay and wait patiently for the best price. I had about 400 unbuilt kits at one time but sold about 150 over the last two years up until last year. The two most expensive kits I had purchased were the Revell 1/8 scale '32 Ford Hiboy Hot Rod and 1/8 scale '23 Big T bought new at Hobby Lobby with a coupon. That was until last year when I bought a Testors Lincon Mint 1/6 scale Harley-Davidson FLHRI Road King off eBay for $55.00 plus $20.00 shipping.