This is from from the designer:
"The EX01 is not the first high quality folder to only utilizing the anodizing surface as a washer. Almost every manufacturer out there has a knife similar to this construction.
You are correct type 3 anodizing is very tough; it is so tough I have actually sparked it on the grinder. The bearing surface of the aluminum washer is about .800; that's a big surface in contact with the blade. What will happen over time is the anodizing will get burnished. The blade and handles have been tumbled giving them a smooth surface. I don't believe you will wear out the anodizing. There are autos that have the same type of construction and I have never seen the type 3 anodizing wear. The knives I have seen had a sand blasted finish and not a smooth finish.
If the aluminum washer was kind of small like 1/2" or so, then I might be worried but spreading the wear and the contact over a bigger surface, the washer would be the least of my concerns. "
"There is not going to be any weird wear issues; the stainless bolster plates have been machined flat and tumbled and will burnish over time. You got to remember the washer size is huge which is distributing a lot of the force and the wear."
Someone posed these questions to Allen Elishewitz (designer of the EX01)-----
1) Having reviewed your test videos, do you expect the Gmascus to perform as well as the Al., or is there a trade off in going to the Gmascus?
2) On the Gmascus version, the blade pivots around the raised portion of the steel bolster plate? If so, will the plate burnish over time as well? Any weird wear issues?
3) What do you suggest for cleaning and lube, especially if the action gets muddy or gritty?
I'm so getting a 3.5...just can't decide whether to go Gmascus or Alum.
Here were his answers----
"Thanks for the questions.
1- I believe the aluminum will always be stronger than the G-Mascus. The aluminum does not have a machined pocket for the bolster plate.
2- Yes the stainless bolster plate/washer will burnish over time but it is already been machined flat and tumbled.
3- I use gun oil (CLP, Rem-Oil, etc...). "