I am sure Fish livers, aloe vera cant do anything on pimple marks. aloe vera is an astringent, liver oil is omega 3, they just cure and protect the skin surface. For Pimple marks you need to tear off the outer surface of the skin periodically. Its impossible to erase the marks from the skin without peeling the skin surface. Dont fear, the skin peeling happens naturally once in 28 days, but you can do it manually and speed up the process using Lauric Acid, Glycolic acid, kojic acid etc. You have to consult a dermatologist, not an ayurvedic.(yes I agree ayurvedic treatments also peel off the skin using scrubs, but its too a slow process) If you ready to take some risk yourself, i can suggest you some creams available in medical shop.