Natural Treatment for Keloid Scars

I am a 37 year old male and have had keloids on my back and shoulders for about 15 years and on my chest for about 10. According to the doctor these were formed as part of the healing process for acne that I had in these parts. Aside from surgical removal, I have tried steroid injections and multiple scar removal creams. I recently read the posts I tried the baking soda/hydrogen peroxide remedy as mentioned on the earth clinic site. It has been over a month but has not had an effect on the keloids.

Any further suggestions would be really appreciated. The keloids don't hurt much but do itch and sometimes sensitive to the touch. Thank you.