they say the same for headers...but I think we all know how that ends
I did that the first time...painted them, after etching the headers clean as a baby butt...then sprayed 10 thin coats with time in between to set...
put headers on
and cycled the engine, 2 mins, then a bit more
worked great for a month
then all of a sudden all hell breaks loose one ride and I got crusty caked headers
let us know how it works out