Hot melt glue out of a cheap electric glue gun is a handy filler
because it solidifies on cooling. It shrinks when it cools so be
ready to top it up as it cools. It's not hard enough to prevent
denting but probably harder than silicone. Hot melt glue is
removable! Silicone won't melt after curing and I suspect it will
be very risky trying to burn it out.
Great idea! Next time a customer has a similar problem I’ll offer to
fix it for them. I wonder what I should charge for taking the cowbell
noise out of their bling? I’m thinking 2-3 glue sticks and 15
minutes… $25-$50? I may set up a kiosk in the shopping mall.