The Wrapsol install on my rMBP went just fine. No problems.
My advice is to wet the skin quite a bit...dripping wet, and wet the rMBP just a bit. You want enough solution between them so the skin can slide some for perfect placement. A little too much solution is better than not quite enough.
It's only when you use the squeegee that there can be enough solution to form droplets which might drip and go somewhere. I just used a small cloth to wipe the edges as I squeegeed. Squeegee, wipe, squeegee, wipe, etc until the bubbles are out and the skin stays in place.
The easiest piece to install was the one around the trackpad. It's the smallest piece and the rMBP is nice and flat there. You might want to try it first.
For the top and bottom just make sure to get the corners right so none of the skin's corners are hanging off of the casing. On mine a couple of corners didn't want to stick down initially, but as they dried, they got "stickier" and stayed down.
Keep things very clean in the area during the installation. You don't want any stray bits of junk under the skin.
Once the skin is installed let it dry. Even though it might look like it's really well attached, it can be some time before it's really on there. Picking up the rMBP sideways and move the skin. I let mine sit about an hour. It probably doesn't take that long to dry, but I wanted to be sure it was secure. Check those corners though.
Wrapsol...it's great. Matte and just the right amount of grip.
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Install the skin on a solid surface and away from a dusty environment, as well as a bright light condition to check for bubbles. Make sure you apply a lot of solution so you can slide the skin to the position you want it to. If you have the palm rest skin than I would advise you to be as CAREFUL as possible because if it gets into the speaker grills, keyboard, and ESPECIALLY the trackpad, your not gonna be happy with the results. Also, if you have a trackpad protector skin you should NOT install it, through two personal experiences I had the solution pass through the edges of the trackpad and it caused a loose clicking sound, which I exchanged both and will never do it again. In addition, always have a towel near by to wipe the edges and leftover solution you disperse right away so it doesn't get into the system.
x2 on skipping putting the skin on the trackpad. I put it on mine initially. The installation went fine, but I didn't like the textured feel. The slightly textured skin on the rMBP feels great, but the trackpad feels better smooth to me.
