Fuel tank leak

I have discovered that my fuel tank has many pinholes in the bottom. I discovered this while stripping the tank for a new paintjob. I am wondering what is the correct and or best method of repairing these. I hope to have no problems for years to come. This is the last step of a recent project and must be done right. The tank is not rusty and is well I thought it very good shape, but the paint must have been blocking all these holes before I stripped it. Thanks in advance for your suggestions.

How many pinholes? to many to braze? brazing would be the best.good luck