I painted a kr 660.
Had to straighten a couple things, but not too bad.
Went in figuring it would take a couple days of relaxed puttering and maybe $40 in material.
Ended up being pretty much a week of steady hard work and over $100 (I quit keeping track after that) in material.
Ended up taping off the trim pieces on the drawer fronts because I was afraid by the time I hammered them off and back on they wouldn't survive, which may or may not have taken longer.
Mostly it was just a lot of pieces to disassemble, clean, sand, tape, prime, sand, spray, untape, and assemble. Drawers in particular have a huge amount of surface area to prep.
Also took up a lot of room, drawers eat up space fast when layed out for spraying.
I'll never do it again, just not worth it. Far far more work than justified.
It could be half assed way faster, but I've seen toolboxes painted like that, and they look exactly like that, half assed - especially a couple of years down the road.
The thought of building a box, and then having to paint it makes me shudder.
Pricewise, I'm guessing just the consumables - paint, sandpaper, primer, cleaner, welding wire/rod, grinding/wire wheels, electricity, gas to run around for all this, etc... is going to be as much or more than the hf 44" box.
Materials are going to be that much or more on top, almost certainly more. Probably quite a bit more.
Plus the time and effort.
Assuming you already have all the equipment and tools to do it, yet somehow do not have a toolbox.