These were ordered at a client's request to attach to cabinets on a yacht. I haven't seen them attached so cannot say. It appears they are painted and could possibly chip. The holes were bigger than they appeared.
My experience with this shop was not as good as I had hoped. I had order 4 Edge brackets for decoration purposes for a crib I was building. Upon ordering, the shop sent me the wrong items. Luckily, the packing slip that was shipped with them clearly showed that the items shipped were intended for someone else's order. I submitted a claim and asked that I either be refunded or send new ones immediately. We agreed to new ones, however, they were still shipped via "standard" shipping and took over another week to arrive. As a result, they arrived after my child's birth and the crib was not fully completed on time as I was hoping for. The quality of the brackets themselves though are as described so the product itself is good; however, the customer expereice/relations is not what I would expect.