Originally Posted by
PureSound15
Not completely true - and burning your paint isn't the only thing you need to worry about.
Cars with varying hardnesses of clear coats will react very different to some types of cutting liquids. I've seen someone take a "harmless" $15 random orbital from walmart and swirl their paint to where I could not fix it.
That being said - if you have any clue what you're doing, the flex is pretty easy to use. If you're really afraid of burning paint, throw some tape on hard body lines.
I'm sure Jon has other words of wisdom.