I got my tattoo's before I was saved. Some of them cover up stab wounds that I received in the mid-70's. I believe the Lord has used my "tat's" for witnessing. I am an over the road Trucker and have been for many years. Though I am slowing down as I get older. Having the tat's has allowed me to witness to not only Truckers but prostitutes, bikers, teen runaway's etc. Basically, anyone in a suit and tie couldn't have gotten to square one with these people.

You mentioned the "Old Testament". My question is are we under the Law or are we under His Grace?

1Co 7:22  For he who is called a slave in the Lord is a freed man of the Lord. And likewise, he who is called a free man is a slave of Christ.