Step 2: Something smells funny...
Another thing you can do is to spray outdoors. If the weather is nice, this can be a viable option. In the photo of the outside scene, I have demonstrated what you want to avoid with accumulating too much spray on your material.
As a note, it is always good to use protection! However, some of us like to live on the wild side, and if it is a quick job, you should be fine. Of course, what I am referring to are gloves and a respirator. In terms of gloves, iif the spray gets on you, it wont kill you with, but getting adhesive on your hands can be a pain. My own general rule is that if i am spraying for more than 2 minutes, i put on gloves because it i will make cleanup (of my own hands) easier. Now, to address respiration. When i have one or two quick sprays to do, I normally just hold my breath when I am spraying. However, whenever i am doing multiple sprays for an extended period of time, I use a respirator. A simple dust filter should suffice.
*As a note, some people can be allergic to the chemicals in Super 77. It is always best to use this, and really any other chemical heavy product in an area where human exposure is minimal