I need to repair a bronze pump impeller where the pump was run so long that the spring from the seal wore a grove in the seal side deep enough to make a few small holes all the way thru. This will involve building up some material to fill the groove without it draining thru the holes. The part will get bead blasted before repair. Although I probably could use JB weld (this is just a flood coolant pump) I would prefer to use metal, can I use silver solder (HVAC type) or is there a better alternative? I'm thinking the solder will just flow thru the holes& be hard to build. I may have some silicon bronze .035 mig wire I could tig over the holes first if that would plug them so I could fill the groove with silver solder.. Any recommendations or should I just JB weld it?