Yes, if you have a bench capper. Some people have reported varying success with the wing cappers. You can't use a bottle brush on them though, as you will scrape off the plastic lining.
I have not found a way to get the paint off though, if that matters to you, without sanding it. I ended up scuffing them up and painting them with silver paint. Here's a thread I started a while ago when I used them. I haven't used them a second time, so I don't know how long they will last.