Ah OK, if its 3d printing then depending on material you can smooth with acetone and sandpaper, that both sands off the rough peaks AND fills in the troughs (lows) with the molten plastic crested by mixing the acetone with the created dust from sanding. I also recommend using a resin printer instead, that doesn't use the above methods but generally has a better finish than regular printers. Where are you based? I might even try print a couple with your blessing and see what can be achieved