Reddit mentions of Lactic Acid 50% Gel Peel 1 fl oz.- Enhanced with Kojic Acid & Bearberry Extract (Professional Chemical Peel)

Here is my unbiased, heavily researched answer. I'm a doctor and also struggled with blackheads/acne, and the below answers tend to work well for almost everyone.

Use a cleanser and a toner as directed on the bottles once in the morning and once before bed. In addition, the below advice works really well for clearing out and keeping out blackheads, as well as preventing and treating acne.

The reason products like Pro Activ tend to work is they force people into a schedule of doing something productive on a regular basis. You don't need to spend that kind of cash as long as you keep a good regimen going. So in addition to cleaner/toner, follow steps 1-2 below and consider adding #3 for a huge punch, #4 if you want to take it a little further and get rid of some scarring (over time) and really keep your skin looking young, glowing and cleared up. USE PRODUCTS AS DIRECTED when you buy them - don't let a peel sit overnight on your face just because you think it'll help more. That's like turning the oven on 500 degrees to cook your cookies twice as fast - it doesn't work out and you just ruin the cookies. Same goes with your face.

1. Use a pore strip (the Biore ones work well) to initially clear them out. You can do this 2x/week if you like. It's a way to remove without squeezing (squeezing = inflammation). This gets rid of most of the big ones. I use one on my nose and one on my chin.
   
   to prevent blackheads, follow remaining steps. Some product links at bottom
   
   
2. Use either a moisturizer with salicylic acid (Clean & Clear makes a great one - it's oil free) or benzoyl peroxide plus any other moisturizer on problem areas in the morning after you use a cleanser + toner. Problem areas are usually nose and chin. The acid eats up the blackhead a bit.
   
   
3. Clay based mask (any old kind, cheap, as long as it's clay based) once or twice every week for 15 min to 60 min (you don't have to be strict about the time). Do this far from the time you do the peel (see below). Yes, guys do this. My husband loves it. I do this right after I use a pore strip.
   
   
4. Consider adding a low to medium strength glycolic or lactic acid peel to your skincare every 3-4 weeks once. Follow the instructions meticulously. Don't get 80% stuff. Get lower percentages to try so you don't burn your face off. Don't do a mask within 3-4 days on either side of the peel. The next day or 2 your skin should be a little rough and dead-ish (because the top layer literally dies off faster than usual) and then boom your skin is brighter. This gets rid of the dead flaky stuff that encourages oils to stay in pores.
   
   
5. Finally, if these things aren't cutting it or you are getting to the wrinkle stage of life (or want to prevent them - usually mid to late 30s) consider a retinol based acne face serum or cream. This will increase your acne for a couple weeks because it pisses your face off. Get through it and then your acne should go down. Don't use this if you're female and in the child bearing stages.
   
   Pore strips:
   
   http://www.amazon.com/Biore-Deep-Cleansing-Pore-Strips/dp/B0009EILKS/ref=sr_1_2?ie=UTF8&qid=1404574003&sr=8-2&keywords=pore+strips
   
   Moisturizer with salicylic acid:
   
   http://www.amazon.com/Clean-Clear-ESSENTIALS-Action-Moisturizer/dp/B000052YJM/ref=sr_1_2?ie=UTF8&qid=1404574034&sr=8-2&keywords=salicylic+acid+moisturizer
   
   http://www.amazon.com/Burts-Bees-Natural-Solutions-Moisturizing/dp/B0027TSO5A/ref=sr_1_4?ie=UTF8&qid=1404574053&sr=8-4&keywords=salicylic+acid+moisturizer
   
   Masks:
   
   http://www.amazon.com/Anthony-Logistics-Men-Cleansing-Ounce/dp/B000J4K0YI/ref=sr_1_30?ie=UTF8&qid=1404573858&sr=8-30&keywords=clay+mask
   
   http://www.amazon.com/Freeman-FREEMAN241620-Facial-Masque-Purifying/dp/B00005NFBD/ref=sr_1_3?ie=UTF8&qid=1404573943&sr=8-3&keywords=clay+mask
   
   Lactic peels:
   
   http://www.amazon.com/LUMINEX-Skin-Brightening-Peel-Pads/dp/B00H8ZLVTE/ref=sr_1_11?ie=UTF8&qid=1404573483&sr=8-11&keywords=lactic+acid+peel
   
   http://www.amazon.com/Lactic-Acid-50%25-Gel-Peel/dp/B006ZBP8NM/ref=sr_1_1?ie=UTF8&qid=1404573664&sr=8-1&keywords=lactic+acid+peel
   
   http://www.amazon.com/Lactic-Acid-40%25--Beverly-Hills/dp/B00CMBS70U/ref=sr_1_8?ie=UTF8&qid=1404573483&sr=8-8&keywords=lactic+acid+peel

Lactic acid is amazing for PIH. I've had great success with it at 50%. It takes about 6 peels to significantly fade my PIH. Do your research though and don't just take the advice of a stranger on the internet without double checking what they are saying.
This is the stuff I used: http://www.amazon.com/Lactic-Acid-50-Gel-Peel/dp/B006ZBP8NM

Alternatively, have you considered visiting a dermatologist for a retinoid prescription?