Originally Posted by Bailes1992
I dont particularly like to use copper grease on spark plugs as I've had a few issues with old grease that's gone rock hard and made it difficult to remove the plugs. However if they are replaced yearly copper grease shouldn't be an issue.
I tend to use a ceramic grease these days though, especially on glow plugs.
I've seen some places using the ceramic grease when fitting pads etc. we trialed it at a garage I used to work at for a bit but then went back to copper grease, no idea why but the ceramic
Stuff worked well. In fact when I fitted my brakes on my Cossie there that was about 5 or 6 years ago and u can still see the ceramic on the back of the pads where copper grease would have washed away by now