Diamond Shield

If it has mold / stuff growing under it ( normally what happens ) it isn’t cleaned it must be removed . It’s not easy. I paid a detailer to remove mine .. 800 bucks additional while I was having a wash wax and wheel polish done. The removal took 3 guys working together with wallpaper steamers , plastic razor blades … a pack of 100 all over the ground .. and a solution of their own … and lots of towels etc several hours For an idea what your in for Google ugly shield in Tampa .. they do in house removal snd also sell solutions for do it yourself. I didn’t use them but their info is accurate last I looked There are other solutions .. good luck.
If your “just” cleaning a perfect new shield I used 303 protectant.. but of course it didn’t stop the ugly progression.
I’m not a fan of shields and will just budget a repaint if I need it in 6-7 years .. but that’s just me others swear by the shield