Yes, it pays to be patient, ask questions and read. There are plenty of people here who are more knowledgeable than I and hopefully they will chime in.
Lead dust is dangerous, so you don’t want to grind it. I think most would leave it there if it is in sound condition.
Now that you need to address it, I believe this is the proper product.
<section class="mb-5"> <div class="row justify-content-center"> <div class="col-md-9"> <div class="well"> <p>Repair metal with metal—instead of lead—using USC® All-Metal</p> <ul type="disc"> <li>Can be drilled or tapped</li> <
www.eastwood.com
There is also a lead-free solder that is probably a whole new learning curve.
Again, I am just a newbie too and hopefully one of the resident experts will chime in. Good luck!