Originally Posted by
RCMoeur
Not a lot of work if you cheat.
I use a sanding drum on a cordless dremel-type multi-tool for surface prep. Takes only a few seconds to get a nice clean area of virgin rubber. Using this, my patch success rate is 95+ % using Rema fluid & patches, even with the newer tubes.
I've used this sometimes, but found it's easy to go through the tube wall, unless you use very slow speed.
I've seen people rubbing tubes on a concrete curb or wall as abrasive too.