I've got a mild steel paperweight I made when I was at school which I want to keep in good condition from a sentimental point of view.

Unfortunately it has a couple of deep gouges 1-2mm deep, 10mm long, in it from when It got dropped when I moved House. I tried filling it like car bodywork with filler and then repainting it but the filler always falls out after a while.

Is there any metal welding wire that can be melted with a blow torch to fill the hole with a blob of metal for a better repair????

I've heard of welding wire that has flux in it to flow the molten metal. Would this work???

I've considered just filling it with electrical solder but the finished metal is quite soft.

Any Ideas???