Testing a copper pipe cleaner - it didn't go well

There are lots of videos showing these things working. But they often have jump-cuts in the video to hide that fact that they didn't work very well. The online reviews are also very mixed. Maybe there are good and bad ones. I got a set of these from eBay to try after a frustrating experience with a short and inaccessible pipe covered in stubborn paint. I ended up just sanding gently for ages with an abrasive strip and a mirror to get to clean smooth copper. When they arrived I was quite excited until I tried them. But at best they slightly polished pipe that was already quite clean. The idea seems sound though, but I think it really needs to be engineered well with accurate sizing and bristles of just the right strength and angle. Quite neat the bristle pads are made though, with pre-folded staples punched through a plastic strip and then folded slightly. I think the original hand made units may have used the existing bristle pads from the hand-held version put into a machined cup. If it works then it would be very handy in a right angle cordless drill for cleaning pipes with poor access. Let me know if you've tried these devices and what your results were. If you enjoy my videos, you can help support the channel with a dollar or two for coffee, cookies and gadgets, and keep it independent from the quirks of the YouTube algorithm by supporting me on Patreon. This also lets me link to my content on other platforms if YouTube uses the ban-hammer (again!) I release content for critique and feedback on Patreon as soon as it has been made. https://www.patreon.com/bigclive Alternatively, for a single contribution you can use PayPal:- https://www.paypal.com/paypalme/bigclive #ElectronicsCreators