wow i have never really prepped a shaft. all i do is strip off the old vane with a gasket scraper get it all off and glue off then install vanes. i only use super glue type glue. i have never had a failure with loctite control tip gel, goat tuff, gorrila super glue. the goat tuff is some super strong stuff by far the best bond, but i use the loctite alot also because i love the tip on it very easy to control the amount and location. i have used several types of vanes with these glues also even ones that people have trouble using because they say they dont bond well. the best dollar for dollar glue in my mine is the loctite because its so easy to use, and the tip never clogs.