Kellie this was our 1984 trailer with a steel sheet roof, badly warn, old paint, old silicon, now sand blasted clean and 1 fresh rubber coating!
I did the rubber roofing project on my horse trailer this weekend, very happy with the results, The product is a lot thicker than I imaged but that is what I needed, a good thick product to cover well.
Definitely only needed one coat! Very happy with the results, attached are 2 pictures. (I believe you have the before pictures.) Also attached are pictures of my trailer finished on the outside you can use for you next broshure to get those horse people buying the product 🙂