A few things most of you who want to get into 3D printing, but haven't yet and don't realize -
1 - it's slow. I'm talking some 6" prints of a statue take 16-24 hours on non draft quality. Then 12 hours in when employee x comes to see how awesome it is... He bumps the table, the extruder skips... And you start from scratch.
Learning how to create a 3D object isn't easy. Button on your chainsaw broke? You'll probably need 5-10 days of training to learn how to reprint that button if you don't have any 3D experience. And it'll likely take 2-3 hours to print depending on size.
I'm talking strictly filament printers. Resin ones are a bit faster... But have their own downsides.
I do think 3D printing is going to be the future in signage. But when I say that... I'm not talking $200-2000 printers. You can get 3D printers that are big enough to walk in right now. Them are likely the ones that will help your business... Not these cheap toys.
Don't get me wrong. 3D printing is fun. But there's a huge, huge learning curve. And unless your spending $20k on a printer.... And hundreds of hours on learning, you're not going to make money off of it. If you see it as a hobby, a fun toy..... Something you can use to make 3D models of
signs to showcase to customers....They're great. But if you think you can buy one and get the same return as a printer or a cnc machine... They're just not at that stage yet.
I've owned 4 different ones. From the Chinese ones that have come in 4000 pieces you build yourself, to the $2500 model. Sometimes you have fun, sometimes you want to punch a wall, or the guy who invented the printer.
Again... Great toy / hobby machine. Unless you have some 3D modeling experience, or are willing to spend hundreds of hours learning it... Youre limited to pre-made files. Which isn't bad, there's a huge community out there. Good for neat / fun stuff... You just won't be doing custom pieces for your chainsaw or car button that fell off.
[Edit] as for the sanding. Look at ABS and acetone bath. Lots of youtube videos on it. It uses the fumes of acetone, but it makes the prints come out super smooth. Most printers can't handle ABS without an enclosure and modification, unless you buy a high end printer. But you cut out hour of sanding and post trimming this way. One of the main reasons I went from a $200 DIY printer to a $2500 printer.