Forever young BBL on arms, chest and face

I have fair skin, a childhood full of sunburns and now as a 39 year old I'm left with sunspots on my arms, chest, shoulders and face. I've done 3 separate bbl treatments. One on my chest, one on my arms and one of my face. The nurse was sweet enough to do a spot test on my shoulders too. I'm attaching pics and as you can see I think I need a series of treatments to see any progress. My arms and chest definitely reacted and got the "peppery" look for a few weeks after treatment. My face didn't respond but I believe the Medspa is going to redo that treatment as no brown spots seemed to react to the BBL laser.