Sometimes I have to remind myself that most people on this board simply do not know how to inspect paint.
YOU CANNOT FINISH 100 PERCENT with wool, period. You will ALWAYS have wool marring from the fibers spinning across the paint. Think about it...
If the wool increases the cut of the polish (which it does) then it has cut. If it has cut, then it will not finish LSP ready, unless your standards are low.
The other thing that might make it "appear" LSP ready is if your product "fills". My favorite combo is SIP/Purple Wool, but it fills. The other night I finished a 5 million dollar car with that combo. Looked perfect. The next morning, wool marring.
The only true way to ensure that you have no micro marring when you are finished (and its not filled) is to finish your polish out completely and use a pad with zero mechanical cut.
I know.. I know, SIP doesn't fill... Even though I have a PM box full of (or atleast I did) messages from top detailers on this board who have all experienced this.
Also, be careful on who you trust, I know a couple guys on this board who are respected, but have heard from relaible sources that their work is sub-par. Polish your car with wool and your polish, then wipe clean with pre-sol and inspect under halogens at a slight angle. I promise you will see wool marring, and if you don't, you have no business polishing a car IMO.