Originally Posted by
bucketboy
Might not but if it stop me getting a carbon splinter in my hand then its worth it, I got one from a carbon fishing rod a few years ago, it was a right b!tch to get out

I think you would be more likely to get a splinter while doing all the chassis prep than you would from an "un-prepped" chassis.
Any chassis I've ever had I just simply lightly file the sharp corners and then blue loctite. Never an issue. I don't know where the "have to seal your chassis" instructions originated. Maybe it was something that was once needed and has just perpetuated or perhaps it's for a 1:10000 scenario I've never encountered.