Brian at Apex Detail posted his Sonax Spray + Seal video recently, and using a sharpie marker dot as a reference he tested the stripping effectiveness of various cleaners against Sonax. And this made me realize, if we use the dot as a reference point we can quickly and easily test the cleaning power and/or the abrasiveness of LSP`s. If I lay down the dot on bare paint, spray Ice Detailer or Bead Maker on top, this isn`t going to degrade the dot. If I put another dot down on bare paint, try and wax over with Zymol Titanium with some decent pressure with a foam applicator pad, still not able to degrade the dot. Wax over with Meguiar`s Gold Class paste (polishing wax), it easily removes the dot that was waxed over with Zymol. Same test, sharpie dots on bare paint with and without Titanium on top, wax over this time with Pinnacle Souveran, both dots are removed fairly easily. So we can build some assumptions with this type of test, and put together a list of which LSP`s may be better to apply over a base protectant compared to others if the intent is to somehow not entirely compromise the original protectant in the process.