I'm using this desk indoors for now for just about anything.... I tend to prefer wood when sculpting with wax, plaster, clay etc. or mold making. But right now the only thing on it is my notebook, printer, & some bills. As for metal work I've got a 3/4" steel plate table in the garage that's a beast (@least 400 - 500lbs). Years ago I got REAL lucky one day in picking up some scrap metal & came across it. As for this one, it is pretty solid... however I'm thinking it needs more(x4) supports for a little insurance. If you look at one of the pics you can clearly see there are only 2 vertical supports, & i'm thinking 4 more would help me sleep better...
As a man thinketh, so shall he be.