Absolutely not just for gunsmithing.  Anytime you are working in a dirty environment this is a perfect shirt protector.  
 
The Gunsmith Apron is a doubled layered apron that helps protect the user’s clothing from getting soiled by oil/grease/dirt. The front of the apron is Constructed from Heavy Duty PVC Fabric for durability, and the inside material is made from a lighter and smoother PVC fabric for comfort.
Adjustable 33” Neck Strap, allows the user to adjust how high/low the apron sits on the body.
Adjustable Waist with Quick Snap Buckle fits up to 50” waist.
All Neck and Waist straps are re-enforced and double stitched onto the apron.
All edge seams are sewn re-enforced with web material.
Front Panel Size: 30” Tall X 28” Wide
Weight: 11 oz.