Can incorrect main bearing oil grooves be filled in?

[Zener424]

I purchased a used running '31 engine with low miles. Upon inspection I found it to be in very good shape. However the main bearing oil groove for the rear bearing has an additional groove cut in the center leading rearward. Other than that the bearing is in great shape. Has anyone had any success in filling incorrct bearing grooves with solder or babbitt? If so, what tool did you use to melt the solder or babbit into the groove?