I use Mettler Web Bond and don't have a problem with overspray or fumes. Before I discovered Mettler I was spraying outdoors. It was quite a job to get everything outside and set up. I also had to wait for suitable weather. I couldn't baste in the winter or on windy or rainy days. And it was very unpleasant in the summer when temps here are high 90s to 100s. Now I can spray baste whenever I want.