[jdoria]

Its one of the easiest things to use.

Just be careful of:

Headliners that are glued up, you may soften the glue.
Steering wheels that are already peeling, you will peel the rest of the coating off.
Radio button markers that are painted on, you may lighten them or remove them.
Paint chips, you could heat up the area around the chip and get under the clear.

I say "be careful" not "avoid". Just watch what you are going as you go.