FYI... I'm using similar review content for several Sentry Solutions products that I purchased here at Amazon.com as all are commented on within. I use this specific product to "recharge" my TUF-Cloth and to spray on cleaning patches for quick cleanings between range sessions when a full cleaning isn't required. Here is the full review: This item is no joke. I bought it because I like the idea of a dry lubricant for lighter recoil guns, my carry gun (pocket & clothing lint) and my .22s due to their excessive lead and carbon buildup. These types of products take more effort and patience to apply, but they are worth it. You can actually feel your firearms function more smoothly after using them, and they make subsequent cleanings far easier to manage and take less time. This product is recommended highly for knives, while SMOOTH-KOTE is recommended for internal firearms parts. However, TUF-Glide can also be used for quick cleaning and light cleaning of firearms, and in fact the US Army uses the TUF-Cloth in the field for on-the-fly rifle and handgun cleaning, particularly in the desert, dusty environments of Iraq and Afghanistan. TUF-Cloth is a 100% lint-free microfiber cloth that is saturated in TUF-Glide and reusable. I prep the surface with 99% isopropyl alcohol as my solvent, which dries quickly, and then I apply SMOOTH-KOTE with a hobbyist paint brush to all disassembled internal parts. One warning, you can absolutely use SMOOTH-KOTE on the outside of your firearm too, but it dries to a charcoal grey color so most people do not do this. I don't. I run the TUF-Cloth over the outside metal parts after I've reassembled it, and I treat all inner parts with SMOOTH-KOTE. That's for a thorough cleaning. For quick cleanings, like if I'm just wanting to polish up the feed ramp, breach and chamber areas, I use the TUF-Glide pen oiler and some tight cotton swabs or small cleaning patches. It's excellent as a cleaner since it's suspended in mineral spirits, and it leaves behind a nice, dry, slick surface. This item's needle applicator has been great and this solution will not clog it. My only complaint about the SMOOTH-KOTE product is the needle applicator will clog if you don't use it for a few weeks and it dries out. This happened to me and I didn't realize it. I squeezed the bottle a little too hard and the stuff came flying out like a laser beam when the clog broke free, which stained my hands, cleaning mat and old t-shirt. Fortunately nothing of value, and I know better now. I actually like the smell of this too, but that's not to say it will be that way for everyone. Anyways, highly recommended product here if you have the patience to use it. I find "painting" my firearms parts to actually be quite relaxing. It's like ceramic figurines, but for dudes (mostly).