I’m trying to fill in some heavy pitting on an area of a frame (front cross member) using some brazing rod. There is quite a large area with minor pitting, and it is proving a bit difficult to get the material to flow easily. I’ve sand blasted the area yesterday, so it was clean. Initially, I used my hearing tip thinking it would introduce less heat, but a section still got warped. Today I switched to a #2 tip which offers much better control of the heated area and puddle. There is also some pitting on the vertical surface which is also a challenge, but I have managed to get the braze material to stick without pooling into globs. The area which was previously warped, warped even more (long narrow low spot), and I’ve been adding more material to level it out which to have seemed to work. I think this area must be really thin from corrosion which caused it to warp like that. So far, I’ve gone through 4 rods and am wondering if there are tips folks can share. The reason I’m doing this is the owner of the shop which is going to blast and paint the frame said I couldn’t repair this area up front with body filler as it wouldn’t take the heat from his oven. He also won’t do any type of work to fill in the pitting. He will use epoxy primer and a top coat which I’m guessing will fill in most of the minor pitting. Is that correct?