in my experience mederma does work. it does take time and you do need to apply it daily. i think even 2x/day.
i would then use spf /mositurizer, whatever you use after the mederma has dried.

also, i think scars take a little over a year to fade as much as they will on their own.

what you can do (got this idea from my daughter) is to take photos periodically of your scars. this way you can see the improvement, hard to see it day by day.
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3a, some 2c & 3b, medium texture, porosity normal, low elasticity
washing/cowashing, conditioning, protein tx: [I] curl junkie products
leave in:cj conditioners and treatments as leave in
styling: cj aloe fix gel, cj pattern pusha, cj honey butta leave in, cj cccc, cj ciab.
sealants - jane carter nourish & shine