Tell us about your Corvette: 1971 Coupe that's been in the family since new. Was "stored" in a shed in New England for 22 years. Even though I have limited knowledge and experience, I'm SLOWLY doing a body off restoration. Standby for many questions!
I think he previously said the coating should be just a bit thinner than a credit card. I'm assuming that since he's using both types of coatings (sound and thermal control), the total thickness would be something less than the thickness of two credit cards.
Yes, I have installed both the sound coating and the ceramic heat shield. Each coating is the thickness of a credit card (minimum, you can you on more if you desire for better results). I laid the sound coating on sort of thick, but put the normal amount of ceramic. I intend to coat the exterior with ceramic as well. The outer coat will be to stop any engine/exterior heat from getting into the car and the interior coat will keep the air conditioned air cool inside the car. The parts wash up easily, but you really do need their spray gun as the material is really thick, but with their gun it sprays easily.
I saw an advertisement showing an electric grill with 2 steel plates coated with Lizard Skin ceramic, one on the left side of the grill and one on the right side. The grill was at 400 degrees. The center was cooking a steak and eggs, while the two outer plates had unmelted ice cubes sitting on them. I would say that is probably what I am looking for here in Florida! If I can find the add again, I will post it.
Also, the spray gun kit comes with a really nifty extension hose and 90 degree nozzle for spraying around corners, inside the doors and other impossible to get areas with no trouble.
I am a cheap guy and have a very tight budget these days so I actually used a product called Frost King Duct Insulation. I have used lizardskin in the past and it is an amazing product but the cost puts it out of my reach. The interior of my 1981 vette was a mess (still is really) left in the rain for 10 years I had to take out everything and sand it back to metal. Then covered the interior with truck bed liner spray. After that dried I laid out the Frost King. It is amazing how quiet the car is from the inside and I don't even have the carpet back in yet.