Good post from SAF.
I've always found nanogen to be quite good and I'm using it again after a while of shaving.
It can really help sprouse up your hair and if put on right, it'll look good. Try doing it in a room like the bathroom with bright lights, or using a x3 handheld mirror thing that way if it holds up under those lights or mirror - it'll look very good.
I do a similar method to SAF, but I spray it on area - lightly tipping it at first and then if I need a touch more, I'll do that - it's hard to explain but I think after a few practises you'd get used to it. If you do it in the bathroom, you can also use your hand to flap it around the rest of your hair - blending it into the thicker hair too.
I seen a guy once who had some sort of concealer in his hair but he whapped it only the top of his head, the conealer he had was black and his hair was brown it looked very obvious, but even then if he applied it liberally, and blended in - it can look very good.
The only bad thing about nanogen for me is it still slightly comes off onto covers and sheets and unless they are dark or black covers, it's quite noticeable. I'm not talking about half a top off on the pillow but a light blue case would look still reasonably ok in the morning just a bit grubbier from the dark fibres.
Another negative of it, is it gives you a image that you'll think 'wow' but once you have that shower and wash it out. You have to start again and place it in. So in that way, if you want it to look natural, you're going to need to treat it like it's an everyday part of your grooming regime.
I got so fed up of concealers a while back and decided to shave my head, I'm now grown my hair in but my problem was my hair was too long for concealers. I was NW3 and had a moptop of thinning/diffuse hair. I've now opted that although I'm a NW3/diffuse as well - I can still look reasonably ok if I keep it shortish on top, and with short sides as well .
Similar to this style;
http://www.splicetoday.com/vault/posts/ ... 1310066227
This guy is pretty much Norwood 3 - he shaved his head a while back. Maybe 2.5 and with some hair on top and keeping it short, you can look very decent and give an apperance of more hair.
http://userserve-ak.last.fm/serve/_/212 ... tevens.jpg