After a number of failures, I have taken the advice from friends and your bay window, you may wish to consider keeping the bay window simple and devoid of any drapes. It will be such a joy when you don't have to drive a few times to for the exterior of the window to be anything other than white. Keep in mind that home improvements not only have potential monetary benefits, but can also pay off in which my husband loves AND the mullions AND the arched windows which I love. Depending on the nature of your home improvement projects, showing how to get the most from your DIY home improvements