I am not asking about validity/preferences regarding doing this process, but rather asking if anyone has industry experience with it. I have found a place locally that will do the entire process for me for about the cost of just the chemicals (If I were to buy the powder in a large batch) so I see it as free labor and disposal of waste...better for my health AND sanity
I am not sure if you are contemplating alodining all the components before final rivetting or alodining the whole wing after fabrication but I am presuming the former.
The problem with commercial alodining of your wing components will be one of logistics.
The alodining company will most likely have a minimum batch cost so it will only make sense to do large numbers of components in one batch. As a result you will need to be able to identify all of those little match drilled left and right components so that you can clecoe them back into their correct position. But any pen markings will be erased during the pretreatment and alodining process so you will need to have a physical identification (indentations) of the items and have a record of what those markings mean.
But perhaps more important is that you will have to keep a complete inventory of every single item you get alodined. It is not enough to simply count the number of components (here's 130 components and I want 130 back). If you get less back than you gave them you need to be able to identify which components you did not get back.
I can assure you that in wiring up of all those individually shaped components onto racks for dipping it will be highly likely that some of them will end up in the bottom of a tank where they will stay until the tank is cleaned. The plant may be using a phosphoric acid pretreatment and alodine is a chromic acid so it is possible that your parts might be cactus by then (and you wont want to wait that long anyway because they may be lost elsewhere).
So that's probably the biggest problem...losing little one-off custom made parts that have already been match drilled and then trying to figure out what's actually missing.
You can complain to the treatment plant but your job will be worth stuff-all to them and is not commercially ongoing. So they just wont care if things are missing. It will be a nightmare for you but irrelevant to them.
Aloding is a very good process. Both Cessna and Piper now use it under all of their primers. But I recommend you do it yourself to keep control of your parts. Then you can do it in small batches as required. It's no big deal.