Dan I have had only 2 times where there were very small bumps in the coating, not really bumps but more like tiny holes. I sublimated to them anyway and they disappeared and I could not find them when I pressed the image into them so I shipped them and even made a point of telling the customer to finely inspect the item. All was well.
I think if you look hard enough you will find imperfections with every aluminum sheet. I think that because of the price of chromaluxe, there should be better quality control being done because its very expensive.
What I like about my metal also is its a softer coating so I have experienced 0 chipping on the edges.
Now mind you, when comparing a chromaluxe print to my print you do notice a slight difference. Chromaluxe when done right gives you the best print on metal and there is no denying that. The colors are just extremely vivid and gives you the closest match to your digital photo.
My metal looks great, and everyone who sees it in person is very impressed. But I am talking about the every day person and not a professional photographer (have not got that far into the industry yet).
Here is a video comparing the same print onto the chromaluxe and the other is on my metal which I call "imagine metal"
https://www.youtube.com/watch?v=3vgRrooaQCwI still stock the chromaluxe because I know there will be demand for it especially from professional photographers, but when given the choice at almost 40% off the chromaluxe version, everyone decides to go with my proprietary metal and have had only happy and repeat buyers.