Used incorrectly most car cleaning/detailng products will cause damage to a greater or lesser degree.
The instructions provided with the kit are straightforward and, followed correctly, will ensure no damage to your paint and, ultimately a smooth clean surface ready for further correction/protection.
Like I have said in my review, use plenty of the supplied lubricant. Also use the reccomended amount of clay, apply very little pressure when using and you'll be fine.
Used it today on a BMW that has previously only been wash/waxed and the results were impressive. You won't regret it.