The clear is a 3M polyurethane anti-abrasion tape that I have used on the leading edge of my wood props. I usually use that thin stuff if I want to protect structural tubing under an uncushioned Adel clamp, or even one that is cushioned sometimes. The black is a self-fusing rubber (I think EPDM) tape when I want a little more cushion or clearance, or want to use a wire tie for instance. I'll use it around wire bundles sometimes too.
Speaking of wire ties, there is an article in the March Kitplanes magazine where the author states that it is "poor practice " to use them on aircraft. I have to disagree... just like everything we do with aircraft, there are proper ways to do things, proper tools and materials, etc., and then there's the wrong way. I think that lacing your wire bundles/runs is great, but I also believe that wire ties can be great for that too. I like the T&B ones with the S.S. insert, UV resistant black. They are very high quality, and pretty expensive, but I believe they are one of the best. They have to be tensioned properly and not too loosely. People complain about the sharp edge when you cut off the tail... it's very easy to cut those perfectly flush with a small flush diagonal cutter. I've got 'em all over my 26 year old Thorp, including the engine compartment, and there has never been a problem with a single one that I'm aware of. I've got them all over my Kitfox too. Lacing can be improperly done also... too tight or too loose, and it can just as abrasive when dirt gets under it as a loose wire tie. Tighten your lacing too tight & the much thinner (than the average wire tie) contact surface can do a number on the insulation more easily than a tie. Funny, I see that on my brand new Rotax engine, Rotax installed wire ties in multiple places to keep ignition wiring, hoses, etc. where they belong, and they're pretty cheap looking ones at that. There are factory built airplanes that have also used wire ties extensively. Wire ties seem to be the latest "whipping boy" among some "experts". Don't read me wrong - I believe that lacing is probably the best technique many times, but wire ties can be perfectly fine, even great if used properly, and they're so easy. Lacing can be a real PITA in some locations. The writer's statement just rubbed me the wrong way.