Yes. Here are the options for washing your blower door panel.

1. If the coating on the back of the panel is not flaking off and is not damaged, then it can put it in the washing machine, cold water cycle, on a gentle cycle and with a little bit of gentle detergent.
2. If the coating on the back of the panel is flaking off or is damaged at all, then it’ll need to be hand washed in cold water with a little bit of gentle detergent.

In either case the panel should never be put in the dryer. It should always be air dried.