Originally Posted by onehundred80
Whatever is used as the blasting media it has to be harder than chrome anything harder than chrome will attack the alloy much more and that is the trouble.
If the chrome is peeling then there is a problem already, it will not come loose if it is secure now.
Curb rash would be best fixed by welding and not filler which may come detached or softened when the finish is baked. I'm not sure of the heat resistance of fillers though.
You mention silica which of course is sand.
you seem intent on disputing anything i print lately so here goes. walnut shells can strip powdercoat off automotive sheetmetal without leaving so much as a dimple on the metal. how do i know this? i have a blast cabinet in my garage with walnut shells glass bead and yes even sand (silica) to properly powdercoat an object it must adhere to the metal. if it adheres to the chrome then the chrome is powdercoated not the metal. if you want to do the job halfway by all means p/c the chrome. if you want it done right strip the chrome then p/c the alloy what ever it is , aluminum titanium kryptonite for that matter. a properly prepared surface is the key. anything else is a hack job and wont last. just my .02