It would be wiser to ask your doctor for advice. Having said that, from my own experience and read ups, the effect would be minimal on boxcar scars- which you have mainly on the temples. However, some of those shallow rolling scars would be beneficial. Temple scaring is unfortunately tougher to treat as compared to the rest of the face. I'd say do an overall subcision on all scars and wait to see any visible improvements. If it doesn't work out, employ other treatments such as 3mm needling (at the dermatologist office) to damage the scarred tissues.
Hope this helps. All the best!