Can You Still Get Rid of a Scar That Has Been Sunburnt?

Pulsed dye laser and surgical scar revision will work well for the scars in order to improve the red color. 

Your sunburn should resolve like it does on all other parts of your body.  The greatest risk to you is that if your scar is relatively new it could heal with a darker tan like change called postinflammatory hyperpigmentation.  This can be improved with prescription strength bleaching creams.  As you know, the best is avoid these burns in the first place!