Do I need a microfiber cloth or applicator to use these?

The jelly applies by hand, but a microfiber cloth makes removal cleaner and faster. Specifics on applicator type aren't confirmed—test with what you have on hand first.

Can I use all three colors on the same car, or are they designed for different vehicles?

All three formulas work on a single vehicle. Each color targets different contamination—use them all in one detail session if needed. The specific surfaces each handles best aren't detailed in the specs, so start with the area that needs the most attention.

Will these jellies stain trim or leave residue if I overapply?

Jelly-based compounds rinse off, but overapplication always risks splash onto surrounding surfaces. Apply conservatively and wipe as you go to stay in control.