Yes, I certainly said that servicing TLR shutter is a rather easy job, 1-2 hour job depending on what's needed.
Basically you have to peel the leatherette and unscrew to take the lensboard off. Then take a couple of rings and cams around the taking lens. The shutter assembly is right there. If the contamination is on the timing assembly you can access from there. If you need to clean the shutter blades the absolute best way is to take the whole shutter assembly out (held in place by a retainer on the back) and take individual blades off. Then clean them with lighter fluid. Those blades need no lubrication. Indeed there is only one tiny spot that needs lubrication in the entire shutter and you can forget about lubing. Then you can put the stuff back.