The proof of the pudding... as they say.
They are doing a good job, no filler being used until the top coat. So I am pleased, just very frustrated at the wait.
I will need to revisit the engine bay. I've used some sound deadening products and having read some other threads, it seems they might melt with the engine heat. Can you spray over the top of the sound deadening spray on /paint on products?
Yes if you go back to page 3 of this thread where the link to my restoratation is on another forum. You will see I used a product made by 3M in my engine bay. It gives a lovely rubberised finish, similar to the original and it can be over sprayed by primer and top coat. I also sprayed it on the back of the engine lid and in the bonnet area. It will afford a degree of sound deadening but let's be honest you are never going to get a quiet 500. It's the nature of the beast. I can assure you this stuff doesn't melt.
It was though recommend by a guy who used to have a classic car restoration company and was a concours judge on the classic car scene.