Hello, welcome 1. microdermabrasion is a superfecial resurfacing only. As per my personal experience Not really helpful in post acne scars. 2. 6-8 sittings are required to get the results 3.Post acne scars are three type box scar,icepick ( pin point scars) and rolling scars. pin point scars are difficult to treat while box scars are easy. 4. No crams or tablet can help you out in scars 5. Best technique is CO2 Fractional laser + subscision. It takes 5-6 sitting but results are better than any other procedure 6. Dermaroller + subscision also other method but less effective than above 7. Filler is a have hiding effect it fills the pits and give impression of fullness. its not permanent. 8. Chmical peels if scars not much prominent then peels also could be effective. These are technique you can go through. All procedures take 4-6 sitting and 5-6 month for better results.