You should not have whiskers to begin with. I was certified in aerospace soldering. Use a good wire stripper, sharp wire cutters, and cut thru just the insulation. For most wiring on cars, get a set or two of GOOD small wire cutters. A large pair of cutters like the type used to cut home electrical wiring is too large to do a proper job on smaller wires. The large type will crush and possibly not cut all of the way thru stranded wire like they do solid core wire. Believe it or not, there is an art to stripping, cutting, and soldering wires. When I went thru certification, it was unbelievable the number of people that could not pass the "cert test".Your joint should be Clean smooth and SILVER, not gray, (gray is a "cold joint", if you get this cut out the section and start over.) Trim excess Whiskers.
I always just score the insolation with my knife and try not to go so deep that I cut the wire then twist it off and twist the wire at the same time.302/Z28 said:IMO the best strippers and cutters for automotive wire are made by Kline.