Sheet metal the inside of Bed panels?

[72blaz]

I'm putting repro bed panels on my 72 blazer.. I'm eventually gonna Line-X the interior..but was wondering if anyone has welded sheet metal on the insides of the bed panels as apposed to the vinyl wrapped plywood?.. Since I'm in the body stage.. I think this would be a cleaner look...but I don't see any out there..so maybe there's a reason why?...also thinking of cutting speaker holes before they are welded to panels.....