Originally Posted by
Accumulator
Noting that I only use coatings on wheels...
I find presoaks to be beneficial, just not as magically-wonderful as some people seem to expect. The longer a cleaner dwells on a surface, the better it usually works.
But I quit letting APCs/etc. dwell on my coatings after people here reported how the coating did degrade to some extent when treated with aggressive cleaners. So I just use a pretty potent shampoo mix and that works fine (even on utterly filthy wheels on cars with supposedly awful brakedust issues, even on winter-nasty undercarriages).
As for stuff "not getting stuck to a coating", that has *NOT* been my experience with OptiCoat. Stuff does stick to those wheels, but it`s not all that hard to clean said stuff off; easier than with conventional LSPs and the coating appears to be fine after the cleaning. This coating does shed contamination well, but then so does fresh FK1000P. Best thing about the coating IME is that it doesn`t need redone as often (but it`s much more of a hassle when it does).
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