I do believe RL's are still oil based paint...actually, you can tell quite a difference in paint quality between RL's and lesser Acuras.

However, unless something is in the clay from you dropping it or getting it in there, there is no way the clay bar itself will cause damage to the paint. It is non-abrassive.

Now, you can run a search on autopia.org, maybe make a post and ask there if you still don't feel good about it, but I've clayed various cars and nothing horrible as went wrong. Always improvements.

Ask Chanc, he clayed for the first time a week or so ago and he wasn't sure of it. It really is very easy. I wouldn't post here unless I was trying to help out a little.