I've only ever used UK as a paint coating. I had very good luck with it first time out. Temps and humidity that I applied was about 74 degrees, and about 35-40% relative humidity which was what could be considered sort of high humidity for southern New Mexico at the time. was also fighting the Rain Gods that day, but made it OK.
I would say some tips and guidelines I may offer would be applying within a acceptable temp and humidity range.
Applying this coating is something you cannot dilly dally with. My personal technique was to break any panel into smaller sections, let's say a fender, I did not try to coat the entire fender, even though it was a relatively small panel compared to the other panels on the rest of the vehicle. I broke the fender into two sections.
Apply in a cross hatch pattern, left-right, then up-down insuring full coverage per section, and I waited no longer than 2 minutes to come behind and wipe and level, and I used 2 Carpro Orange Boa MF Towels to level. The application looked flawless, and almost thought "do I really need to wipe to level?", but I did, not bucking the orthodox method of application.
Onto the next small section and one must insure overlapping. again, repeat, wipe, and onto the next section.
You must work fast, but don't work hazardly or sloppily, or excessively applying, insure you've applied completely on a panel, and I did mask prior to coating, this way I knew I wasn't running over onto something else, or not getting absolute complete coverage on the panels.
I did the roof and hood first, and if a trunk is present, again wise to do these horizontal and higher panels first before coating A-B Pillars, Fenders, Doors, Rear Quarter Panels. In other words I worked from top to bottom.
I cannot stress enough the high importance of very good lighting. Portable lighting on a stand, and plenty of extension cord to ease movement of lighting sure helps greatly. Having a clean cart or stand where you can place the product and applicators, or having a friend present to help would also be a help.
I positioned the lighting so that I felt it offered the best angles to showcase the very surface of the paint. And I wisely inspected the paint at various angles as I applied and wiped to level.
After wiping any given panel don't even think about coming back and touching and testing for dryness or to make some minor correction, even in some inconspicuous area to test if dry until waiting at least a good hour's time. You will smudge the application. To err on slightly longer initial cure time if possible is highly advisable.
Hope some of what I wrote helps you. Best of luck!
In no way would I say such was OCD, such does aid in insuring a flawless application with no regrets after