The biggest thing to remember about covering is that it is a long, slow (and at times) intense process.
Don't think: "I'm going to cover my wing tonight".
Think: "I'm going to do some covering on my wing tonight"
If you've got a good eye, you'll notice in my videos that (although you only see my wrists and forearms) my shirt changes a few times. I don't recall exactly now, but I'm guessing that it took at least 3-4 days to do that covering job.
Now I could have done it in one sitting, and it could have been done in a single Saturday, but I have a life that needs my attention now and then too.