So I found this great set of white wall tires I want to put on my 968....What ?! OK, kidding of course - a friend of mine just had his 1951 Jaguar fully restored and it has brand new white wall tires. He wants to keep those clean and protected from the elements but has no clue what product ( or products ) would best do the job. He is concerned the build up from any given solutions might eventually " yellow " tne white wall, but without any protectant , he'd probably have to wash those all the time , and also they may dry & crack prematurely . And unless something is used which can very quickly permeate into the surface to keep it from drying, that could even attract more dirt. Is this a no-win situation ? Or does anyone here know of something he may be able to use for the best results and longevity in terms of cleaning and protection ? And Darryl...in case you see this post, your expertise would be much appreciated .