Originally Posted by Groucho
No-name stuff on ebay. It's only $5 with free shipping and I already have 5 full bottles of the instant detailer that's used for lubrication. But, it's no good to me if it'll scratch my car if it's for extreme issues only
I've never used any of the ebay stuff, they may be perfectly fine.
I haven't had any issues with the three I mentioned scratching the paint. Start with a clean surface and as others have said use plenty of lubricant/detailer. The Zaino I have uses a mix of their car wash soap and water, I tried it with the Mothers bar and it destroyed the bar.
There is a night and day difference after using it. It isn't only for extreme cases.