I’d suggest sanding with coarse to medium sand paper, then filler primer. The sanding will help with primer adhesion and reduce the number of extra coats.

This is 'murica. we use Webster’s here.

(sorry. couldn’t resist. you are correct. this isn’t a solution.)

not really. Well let me put it this way. The firearms that are entirely 3d printed are basically one-shot weapons.

the firearms that are single-printed components (or maybe more,) aren’t printing components that are part of the firing mechanism. for example, the DefCad team, they’re printing lower receiver for an AR. All the lower receiver does is holds the magazine in place for feeding into the chamber. For some technically obscure reason, it’s the part that is defined as “the” firearm for the purposes of registration.

the reason most ghost guns aren’t actually being printed is because there’s easier ways to get better firearms. Like driving to a state that allows the gunshow loophole and buying them cheap and flipping them in NY or whatever. printed ghost guns are… relatively uncommon, overall.

an Ender 3’s print quality is too low to reliably handle any of the critical components, even for one or two uses. something like the defcad AR lower receiver (which is for some odd reason designated as “the firearm” under ATF regulations…) can absolutely be printed, but not reliably by an ender 3- at least not a stock ender 3. (the defcad team was using resin printers for the dimensional accuracy.)

in any case, you can go to any big box hardware store, drop around 30 bucks in plumbing parts and some quality time with a dremel will produce a fully automatic firearm. should we now regulate plumbing hardware?

“Three-dimensionally printed firearms, a type of untraceable ghost gun, can be built by anyone using a $150 three-dimensional printer,” Rajkumar wrote in a memorandum explaining the bill. “This bill will require a background check so that three-dimensional printed firearms do not get in the wrong hands.”

… No way an ender 3 is going to produce something that doesn’t blow up in your hand.

so. i suggest people get that 150 dollar lol-printer. Should take care of itself.

You called?

well, if it’s your personal mac and you’ll be taking it with you, it’s difficult to see import taxes being a necessary thing.

It’s more the… if a group of people can’t get “good” hardware because of export controls … legally… some might take a shine to yours.

Also, you gotta be careful with macproducts some places.
Especially if they have export controls (Doubt turkey does, being nato,).

That’s nice print!

it’s better to hobby with the kids, than not. When I first got into 3d printing…. My dad had one of those freebie inkjet printers; you know the ones… “free with computer,” but then the inkjet cartridges cost more than the PC did?

It ran out of ink, he was grumbly about it. So I asked if imcould have it. A few months later on was talking about printing stuff on it… I think he wanted to print out taxes. Yeah. “It doesn’t print those kinds of things any more…”

This was late 90’s? I read an article in … maybe it was popular mechanics or something like that… and got obsessed) that was a hideous printer.