I use Caylx on all my manifild. Its easy to install and has never come off or discolored. Installs with tooth bruch. I have done my two 65 GTOs and my 56 chevy 3200. Two I did in place and one I had the manifolds off. When off, I rubbed with news paper after application. I was told a old horse hair shoe brush works well also. If any piece does flack off , It is easy to just retouch. Comes in small plastic jar and you can add water(little) if it starts to dry-out. I got the welder on one of our pipeline crews to use it on his restored tractor and he was thrilled. Said he got a lot of comments as the exhaust manifolds are eye level and right there. Only draw back I had was when you touch it, you get some one your hand looks like silver antiseeze. Over ten years on the GTO and still looks good. Great Stuff.