The frame has a catch in the middle that securely holds the pad which is changed by depressing the catch and sliding the pad and its backing out of the frame.
Solomon, While the product can be used for this purpose, it is not designed for that. There are no guards on the handle to prevent the pad from touching the ceiling so there is a chance paint could get where you do not want. Please feel free to reach out to our customer service team if you have more questions: 800-253-7856
Yes. I have used it on two different colors.
Just use a typical paint tray.
No. This is pure garbage. Do not buy this.
Yes. It has multiple settings for pad adjustment.