Reinforcing pannier rack eyelets?

[Igloo]

Anyone know a way to reinforce pannier rack eyelets or mounts or whatever you call them? The holes you screw the rack into? Mainly the bottom ones. They broke on my last bike, and again after welding back together, and since my replacement bike is chromoly not steel, so can't be welded, it would be good to find a way to minimise the risk (aside from being more aware of the load and how it's distributed). Is there a coating or other treatment? Have others had this issue?
Thanks

[offroute]

Bailing wire wont satisfy the aesthetic standards of most, but it can be used to back up mount connections. I lost a mount bolt once and didnt realize it for hours. Loading up a rack with water, as you infer, can be trouble.