I just stayed mine with flat black aerosol paint.
I do it on a regular basis as blind upkeep.
I have a 15 yr old Double Bull.
Yes there is an odor but this is spring maintenance. Leave it set up a while and all is fine.
JW
That was exactly my thought as to how to take care of the problem. Just spray it well ahead of the hunting season you plan to use it in so the odor can dissipate before use.