Are there any guidelines for soldering 18g leads to Phosphor-Bronze? I assume that I should rough the Phosphor-Bronze up with some fine sand...

Are there any guidelines for soldering 18g leads to Phosphor-Bronze? I assume that I should rough the Phosphor-Bronze up with some fine sand paper before soldering the wires to it, but I'm still concerned about the connection being. (I'm using Phosphor-Bronze for it's flexibility and electrical conductivity). Thanks. Darren Harris Staten Island, New York.