I bought some POR-15 this week and I plan to apply it to the axles I am rebuilding. Mainly I was just curious how hard it is to remove once applied. Reason I ask is I may need to weld to the axle someday. I wonder if it would grind off ok? I know, strange question. Any other concerns I should consider? Also, please check my plan as I want to make sure this stuff works right. The website says that this stuff sticks well to "rough" and "rusty" metal (among other things). But they also say I need to coat with this metal prep if it is bare metal. Well, before I bought it, I ground most of the rust off with a wire wheel and grinder. It's not bare by any means. Do you think the por-15 will stick right without that metal ready?