Hey I used Mederma on some of my acne scars in the past. i did see a small improvement but it was difficult to tell because I was still struggling with existing acne at the time.

I wouldn't suggest mederma because it didn't show results at all on me. I haven't used revitol but i can suggest you invicible scars because it worked for me and it took i assume a month and a half to clear my face. It took long because my scars were 6 months old. Also, make sure to internally treat yourself as well. Internal treatment really helps in backing up the treatment. Maintain your diet and drink loads of water daily. Staying hydrated is the best treatment of all.

I have tried derma e scar gel and it seems to work for me... Then again my scars are relatively new.. But it's worth a go! Good luck