Not to sure on the type of powder coating you are suggesting but a couple of things to keep in mind
To get a mirror finnish you have to have a flat surface to start with and this would mean abrading and polishing the surface
This would remove a certain amount of material thus weakening the object
Most coating processes involve either heat, chemicals or both some chemicals can weaken alloys and heat (depending on how much) can soften alloys (anealing)
The person to tell you if any of this will affect the bocks would be an expert in the coating you intend to use but I would imaging they will want to know the exact material the bocks are made of and that may be a problem as the factorys understandably don't like telling people
The other way is to coat them and test them after (just use them) but remember this would probably invalidate the warrenty
Jason
