We experienced slight flaking of the reflective coating on the
reflector. Nothing major but I could see where you may have issues. LDR (the manufacturer -- Strong is just their US distributor) gave us excellent support though on the couples issues we've seen on our Cantos. The president of LDR personally contacted me and put me in touch with their expert at Strong. Both of those guys made absolutely certain our problems were resolved.
Think I still have their technician's contact into around here somewhere. PM me if you want his info and I'll look it up.
IIRC though, the issue was that flecks of dust from the black paint on the fixtures were getting sucked into the
fixture by the cooling fan and landing on the lenses, then were getting stuck on the lenses directly at the center of then where the beam is the hottest. Might have just wiped them down really well to fix the issue or might have gotten new lenses from Strong. Think we talked about getting new lenses from Strong for free out of warranty but then didn't need to because cleaning the lenses was sufficient enough.
Pull your front and rear lenses out and clean them really well with a 50/50 isopropyl-alcohol/water mix and a non-abrasive pad. Won't be perfect but I bet you'll see a noticeable difference.
The flecks of paint are normal for this model of
fixture. The paint is powder-coated on, and some flecks will be vented around in the
fixture during use.