Typejockeys has a writeup on their blog of their work to re-work this logo for a large Austrian waste management company. I like this as a great example of work you can do cleaning up a logo. Often when we think of conducting a branding exercise, people think a new logo is going to be implemented, but it doesn’t have to work like that. Many times the better idea is to polish up the existing logo: refine the design into something more appropriate to the brand’s objectives.