I have small 3 to 4 pimple marks on my cheecks . I have an important function to attend in a month. I live in town where i dont have much access to good doctors amd city is 120kms from here. I just wana ask what should i use to fade away these marks :- Niacinamide or salicylic acid. I am using benzoyl peroxide 25% since a week but i wanna try something better that can clean up my skin and prevent further acne. I have oily to combination skin. What ingredient would be better for me.