When can I try SMP after FUE into the scar?

Hi Doctors, I have an FUT strip scar from my first procedure in 2006. 2 years ago, I decided to have a small FUE procedure to conceal the linear scar (200 grafts). It helped camouflage the scar slightly, but I could only buzz my hair to a number 3, and alas I could still see the scar. Last week I had a 2nd FUE into the scar (150 grafts). My question is, how long should I wait to have SMP treatment into the scar for addressing my camouflage concerns (if still necessary)? Thank you! Blake