Your totally right about Doxycycline.
That is the best product to clear acne.
I had the same problem.
I had redmarks on my body when the acne went down.
There's a few things you can do to get rid of the marks.
I recommend the Neutrogena Body Clear Body Scrub.
This has 2 percent Salicylic Acid, Green Tea, Aloe, Chamomilla and is very good for getting rid of redmarks.
Its much better then the Neutrogena Body Clear Body Wash with Salicylic Acid
The Neutrogena body wash did nothing for me.
When you get out of the shower.
I would then use Paula's Choice Weightless Body Treatment With 2% Beta Hydroxy Acid.
This is a lotion for acne.
Leave it on your body. Dont wash off.
This is very good product for getting rid of marks on your body when the acne goes down.
It has alot of good incredients.
2% Salicylic Acid, 2% Beta Hydroxy Acid, Green Tea, Flower Extract, Vitamin A, C, E, Grape Seed, Selenium, Willow Herb, Magnesium, Zinc Oxide.
It took about 2 months to totally get rid of the redmarks after using these products.
The Redmarks will fade away.