Thanks for the pix ! I'm guessing the lens damage is good for wet plates you are doing ( à la sally mann? ), I hope you didn't spend much $ on it cuz, it looks pretty roached.
You might see if Adam &al. at SK Grimes can make you a barrel for your lens if your shutter is kaahput and your aperture ring is so jammed it won't move, or you can't get the lens back on the shutter / don't need it..
A barrel might be easier to deal with that than a broken / damaged / seized studio shutter. from my experience using Vitax, you will want to stop down a little bit to focus before you open the lens up and shoot it wide open. you probably can get away without the defocus knob, it still focuses fine with the rear elements stationary. To clean the actual glass i think some people use watered down Hydrogen Peroxide . (Look up posts made by Jim Galli he posted his recipe back in the day.)
You will want to use a spanner wrench to remove the lens elements from their barrels and maybe soak it in the H2O+H2O2, be careful though I'm not sure with the canadian balsam separation your lens exhibits if it will do more harm than good ( I'm thinking fluids might seep in there through capillary action ) --- you might be better off with a damp rag slowly cleaning it rather than soaking IDK. With the elements removed, you can also eradicate the rest of the insect colony &c that is living in there too!
If you get it working, just to let you know even in great condition lens, with it on- camera the lens is so big and heavy there is a lot of tension on the back of the barrel so the knob won't really move that element ez, it will be tight. The whole purpose of the knob is to defocus your stopped down image to give it some blur when you aren't shooting wide open ( its like back focusing, kind of sort of ).
Since you have the lens removed from the shutter can you unscrew the screws holding the plate on its front and get some canned air and give it a blast to remove whatever pebbles, twigs and other debris that might be keeping it from moving smoothly
I don't think that shutter had any lubricant in it besides graphite I'd be careful with using oils and lithium greese and other materials in there.
You might consider sending the lens and shutter to someone like SK Grimes outside of Providence for repair, or Zacks in Providence RI, or Carol Flutot in California or alphaxbetax.com in DC for an overhaul. They have experience with these lenses and shutters and might be able to machine new parts if some are missing, and for a few dollars will be able to fix it instead of a home remedy and maybe damaging it more... so when you get tired of it you can sell it for a few more dineros/
John
ps That all said, if you get frustrated with it and want to sell it, let me know ! I miss mine and I'm happy to take yours off your hands ( roached and all )
pps Here are two Wollensak catalogs--- one from 1906-7 that has info on your lens
when it was called the "Royal Portrait Lens"
http://cameraeccentric.com/html/info/wollensak_10.html
and this one from 1919 when it was called the Vitax
http://cameraeccentric.com/html/info/wollensak_13.html