Store Brand Photoshop

When touching up product photos using Photoshop the most important thing to remember is that it must be subtle. Especially the highlights added to give the item dimension. I have noticed that the store brand cans of black olives and black beans have images on the labels that have been heavy-handedly highlighted in Photoshop. The olives are worse. The look like the tops are covered with a reflective white sheet. Not appetizing at all.