Resurfacing options like facial peels, dermabrasion or laser resurfacing may all improve the scars a little. Personally, I focus first on options that address the deeper aspect of acne scaring as it is the deep scar that is responsible for the common scar depressions. We like deep fractional CO2 lasers (i.e., Encore DeepFX) or percutaneous collagen induction therapy (CIT; a.k.a. medical needling). I consider resurfacing 2nd tier treatments for acne scaring after the deep treatments have been completed.
In general, it is important to understand that the improvements can only be moderate.