“In Colossians 4:6 Paul tells us that we are to present our message with grace, seasoned with salt. This is an interesting illustration for salt does have a tendency to sting when poured into an open wound. When we present Gospel truths into the wound of doctrinal error, it does tend to be uncomfortable. Because of this we must be sensitive to the fact that the Mormon may be especially defensive. However, bear in mind that declaring the truth, in and of itself, is not biblically wrong.”
“Seasoned” means as in flavoring for food, not in treating wounds. Nor inflicting them. You might want to consider that a bit.