All of the "natural stuff" is fine but you need to know why--exfoliants and things meant to help with collagen/pigmentation. That's what you're trying to do, rebuild collagen.
First, are you doing anything to treat acne now? What breaks you out? It's hard to help unless I know what you can't use and there's a lot of comedogenic junk in stuff marked "non-comedogenic".
The best spf moisturizer I've ever used is Olay Complete SPF 15 (or 30). Trader Joe's makes a spf 15 moisturizer as well. That will keep the marks from darkening.
The best GENERAL moisturizer I've used is Triderma Anti-redness, but it has no spf. You need to really make sure to wash anything with sunscreen off or it will break you out.
Now for pigmentation, I'll tell you what I know--be warned that I'm struggling with my own stuff due to hormones (as a woman), so there's a limit on what I know that could help you.
1) There are scar creams for acne marks (look those up on the internet; I'm not convinced brands like Mederma are so great, but that's an option. There's also Invicible scar treatment).
2 Vitamin C products (L'Oreal Youth Code, Garnier Dark Spots, and any online skin store should turn up products if you do a search); (3) retinoids (like Retin-A, or neutrogena) or (4) BHA/glyolic acid; (5) kojic acid (Skinceuticals--is not working for me, though) and (6)copper products (Isomers)--these are all supposed to help. I listed brands but you need to do internet searches on drugstore, skinstore, and sephora.com for reviews. (I only listed drugstore brands but Dr. Brandt is an example of a brand that can be found in Sephora.)
I have a dermaroller and vitamin c/copper powder from owndoc.com but am too scared to use it because my own skin is so messed up and thin, but you might consider it. It takes a long time to ship, though, and is not super-cheap.
You can also try peels--glycolic, lactic, or TCA peels. (May be too harsh.) You can get samples from MakeUpArtistsChoice (MUAC) online.
By all means, try the stuff with lemon in it; just dilute it.
One more thing--I would look into a treatment for ingrowns (but really you could probably just use a mild astringent, like from Clean and Clear; those treatments are usually just exfoliants anyway).
Start marking when you use a fresh razor. I use a cotton swab to wash mine (not for my face, but nevertheless) with rubbing alcohol to get face gunk off of it.
Edited by bizz, 16 March 2013 - 12:52 PM.