Yes. He uses ballistol or other oils mixed with water, to thin them down, and make it easier to spread through the cloth patch strips. The strips are dried, and then rolled up and saved for use at the range. Or, you can cut them into " squares " to use as-is, or cut at the muzzle, as you prefer.
WD40 does displace water. However, when it dries, it leaves a gummy residue, which will eventually dissolve if you put enough WD 40 on it to let it soak a bit, which I found next to impossible to do with the aeresol can of WD40 I had. If you don't get the dried gunk out, it can plug flash holes, and nipples, and gum up lock parts. After much frustration, I finally stopped using WD40 on gun locks, and then in the barrel, and began using NL1000 to coat my barrels between shootings. I check them regularly and hit them again. They are also kept in a very cool, Dry storage area in my home, so rust has not been a problem.
I was given a can of Ballistol, so I currently trying that out as a rust preventative in my rifle during storage. So far, its seems to be holding up. But I still check the barrel and renew the oil treatment every month or so. When its done, I will simply buy a less expensive bottle of mineral oil and use that instead. I use Rem Oil to lubricate my lock parts.
In the winter when I know its going to be below freezing, I generally use alcohol to remove all oils from the action parts, and then put some synthetic oils- just a small drop on critical moving parts. I have a small bottle of teflon oil, and it has been very good for oiling the parts of all my guns when its below freezing. I have not had the guns out shooting below 10 below, the next benchmark, but I am convinced that either bare metal, or just a minimal amount of a synthetic lubricant will do the trick.
There are several syhthetic oils on the market that have been developed for the aircraft industry, because of the low temperature found at high altitudes, even in the summertimes. They were originally developed to keep army equipment functioning in Alaska in WWII, and were quickly adopted by civilian contractors, pilots, heavy equipment operators, etc. for use in and on their equipment all over the Continent.