This is how I built a fuel tank skid plate for my Suzuki Samurai…

 

I wanted a little space between the skid plate and the bottom of the tank. I taped nuts to the bottom to use as temporary spacers while I developed a pattern.

 

I cut cardboard pieces and taped them together until I had a design I liked.

 

I traced the cardboard patterns on 3/16″ steel plate and cut the parts out with a plasma cutter. After spot welding the parts together, I tested the fit on the tank.

WARNING: Never cut or weld near open fuel lines or gasoline fumes. An explosion could occur.

 

I finish welded the skid plate and removed the mill scale in my abrasive blast cabinet.

 

It is finished with epoxy primer and flat black enamel.

 

The skid plate has held up well in use.