As long as you don't overdo the treatments, I think it should be OK. You're not trying to kill all reflections, just get some balance between reflection, diffusion and absorption (yes I had to look up the spelling of that last one ;)).

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8