No one seems to have brought up this solution so im going to give my own bit of info from experience. Using ACV diluted with some water or Rose water for 1-2 times a day for a few weeks will definately help facial complexion, but If you want something better that will kill the pimples properly and help remove pimple marks with consistent daily usage, you should get yourself some 1% Clindamycin Phosphate Gel/Cream. Me and my brother use it whenever we get the odd pimples now, it works wonders, since using it almost a year ago consistently for just over a month, we get very few pimples now. If im not mistake its a topical anti-biotic that will remove your pimples + marks if used properly. It might be a prescription med depending on where you live. If your not given a prescription for this, then screw the docs and screw the dermatologists and get it through other means online. My docs wouldn't understand and wanted to me to take oral anti-biotics and wouldn't listen to any of my advice, so I had to get it myself and do what I know is best for my health and will give me quick lasting results.
I can highly recommend these. I picked up around 10 tubes of this from the Far east when I went on holiday last year, cost under $1.50 each, and each tube should last you anywhere from 2-3 months with daily use. You need VERY small dab sized amounts on each pimple or pimple mark.
Forget accutane and other toxic alternatives, stick to the Clindamycin Phosphate 1% topical gel, if you want to know the brand I use, its called EryTop Gel. I hope you take this advice as its much better to use something like this then going down an oral anti-biotic or the accutane route, not to mention much cheaper and more effective. Dont forget to add in the ACV + Rose water thing I mentioned, that will help heaps too to restore health to your skin.
Much love.