It's working very good since I pressure washed the back side of the cover. You can always go to a car wash if you don't want to buy one, that's what they recommended. I didn't use any allumnized paint. I sprayed Carb cleaner in the reservoir, I think it made some of the paint peel, don't do that.
Both groups have hardly any face flies when I checked yesterday and today. Unfortunately it doesn't do anything for the horn flies on the back. I made a setup to hold a backrubber out of 2" pipe a couple year ago, but it broke where they threaded the pipe for me, ruined the galvanization and rusted through the pipe. It's a frame that you can pull with the ATV, tied the mineral feeder to the back. You can pull it by hand if you want a workout. Next time I'd use the fittings they have in FarmTek that slip over conduit and lock on with set screws. Most of the cows I checked tonight had virtually no face flies, most had hardly any horn flies. The few that did have horn flies had quite a few.
I have also hung a backrubber between two T-Posts before. My cows are essentially mob grazing on a daily move now, everything needs to be very portable.
If you call the phone number on their website, I think it is their home phone. You are going to talk directly with the guy who designed it, he'll answer any questions.