Help with dingy area

[jsjanitorial]

Thanks guys. One small room hadn't been vacuumed in years. Was amazed at what just vacuuming accomplished. When i hit with cimex it was just dark gray foam moving around. Worst thing i have seen yet. I also had to strip and finish 2k ft vct so no time to go back and bonnet as my 175 was tied up stripping. But all in all was still a big improvement and client was happy. They will be a regular vct burnishing client and should also be able to do carpets again in about 6 months and will have more time to post bonnet then.
If I had a crb..how would it compare using the compound to bonneting for this kind of scenario?