Definitely try Dan's AHA. Apparently its really effective on red marks and 'perfects' the skin.

If you can't get that right now, you could try a diluted ACV (Apple Cider Vinegar) solution. That works similarly as AHA, but obviously not as effective.

Make sure you're using sunscreen during the day or the sun can make red marks last longer. Retinoids work better than AHA would for cell turnover, I use tazorac and it works really well but using Dan's AHA will show results too.

I used retin a for 8 months after my accutane course to fade away my red marks after 2 months I went to my derm for something else because my makers didn't budge at all. Even with the use of SPF. So she prescribed me Hydroquinone ointment and told me to use this and retin a and she referred to this treatment as the "gold standard" of Hyperpigmentaion. I was excited to finally have these marks go away. Needless to say I gave it almost 6 months of this gold standard treatment and once again nothing budged! I gave up compleaty at the 8 more mark.

I came across some reviews on Dans AHA+ and saw nothing but great reviews. I figured I'd give it a shot, I mean what did I have to lose. So I fell in love with this product, I ordered it from amazon because it was cheaper and I figured it would get to my house quicker. I have been using it for a month and a halfish and my marks have faded a bunch, my best guess is 70% or 75%. I use it daily mixed with some of my moisturizer. 20% lotion and 80 AHA. Not only has it helped my red marks fade it has also made my face soo smooth and soft and it gives you a glow, the glow I had before I had acne. Acne just dulls your skin and takes the youth out of your face in my opinion and this AHA gave it back to me. I think you'd be smart to give it a shot aswell