I've only ever stumbled upon a few people that had this same problem. All my cars are dark, that may be part of it. I've done a lot of experiments and learned that it has to be applied very thin like most other products. However, if you go thick you'll think that you are OK, and bump into the problem a week down the road.
Basically, it can show witness lines. Almost like it sweats them. Like I said, if you go thick, they will start showing up a week down the road. Also, if memory serves... if you have anything under it (even a coat of the 845 that was applied a week+ prior, it will show these lines. The only way that I put it down is after my final pass with the rotary. If I don't polish before applying, you'll eventually run into issues where you see witness lines rising up.
Obviously, I don't want to always do a light polish before freshening up. It does protect well and it does hold up for a while though. I'm tempted to try a coating but I am suspicious and think that there may be a little too much marketing with all of them.