. Found this at the beach not sure what kind of metal it?s made of I can see a little brownish color under the crusted up sand on it what would be a safe way to clean it
Given it's condition, I don't know that I would attempt to clean it. You could mix Elmer's Glue and water at a 50-50 ratio and coat it using a small paint brush. JMO.
Being that it is your first cross, I would just bag and tag it. When you gradually get a silver, and then a gold cross,, I would put all three in a small shadow box
Congratulations