I have only had experience with one Cimarron revolver, the Model P .44 Special I recently bought. However, I've got two other Uberti revolvers, from Stoeger. All three of these have been excellent quality and well made and finished guns.
I don't know where the final inspection is made, here in the US, or at the factory in Italy.
But certainly any problems need to be brought to the attention of the importer. They have a reputation to protect, and most are willing to take steps to correct problems.