I worked in a Nickel plating shop (very similar to chrome plating) and I know we had to sandblast some parts after plating them and it took forever to get the Nickel off. granted it was about a mil and a half of nickel but we also had an industrial sandblaster shooting a combo of Silica sand and another sand...
from what I understand about the process of chrome plating is, first they Brass plate it, then nickel plate it...repeat this process two more times then finally plate it in chrome... so you got a lot of layers to get through...also note that just because it is flaking doesn't mean that ALL the layers are coming off your top coat of Chrome might be coming off but the Brass and Nickel might still be on there and if they are its really going to be hard to get it off
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