I used Velcro (fuzzy side) on the chime box and back glass frame to replace the dry-rotted Gottlieb foam. I'm toying with adding yellow/Amber 44's under the upper arch on my Diamond Jack .
I've used colored bulbs in a backbox to make minor flaking look better. I also put an orange bulb in a game where the credit when kit lens is missing in the apron.
I have some anodized bolt covers from my gear head days that would fit over the 5/8" leg bolts . Not sure how it would look but the coin door and front legs are the first thing you look at before hitting the power switch and credit button.