Color Changing Backdrop

[fwendly]

I have a client who wants a grey /silver wood toned backdrop. I am unable to source one in time. I wanted to ask how difficult it would be to color change a brown drop similiar to the images I have attached. Would this be a disaster to try once my subject are on the backdrop?

[Damien Symonds]

Any backdrop change is as easy, or as dreadfully difficult, as the frizziness of the subjects' hair.

If you're shooting baldies, you're sweet