Normal 80% Lower Defect or This is Something Else

[SweetPotato]

I bought a few 80% lower from a well known vendor within CalGuns and have them blasted and anodized them. Most turn out fine with the exception of these two. The anodizing vendor explained that those lines are a result of the imperfection of the lower which is seen after the blasting. Though the worker who did the blasting couldn't be summoned because he left the job a few days after. The further explained that those lines don't go away with anodizing. And they didn't blast more because it could remove my marking.

They offer to strip the anodize and have me find a way to remove those lines myself. I don't know enough if blasting to simply removed the marking completely and even up the surface for another anodizing or not. I don't know if leaving those scratch without them anodized will cause any problem or not.

Please let me know your thought but please spare me the "gun will develop scratch over time" (I understand it). I do also want to know if this "imperfection/it came that way" as stated by the anodizer is to be expected from time to time or not.

[IrishJoe3]

Whoa, never seen that before. That sucks, your receiver looks great!

(No idea what caused that...)

[jimbo74]

looks like something contaminated the anodize process, but I have no idea......

[Blade Gunner]

You could cerakote them

[SweetPotato]

You could cerakote them

I could. Just never thought of cerkoting or painting since I thought black anodize is good enough protection. I might do that to these two if leaving them cause issue in the long run.

[meaty-btz]

looks like contaminated anodizing fluid.

[SkyHawk]

It looks like something was drug or wiped along the receiver, those lines are continuous from end to end but also uniformly spaced, which indicates a tool or fixture of some sort created them. I don't think this is a flaw with the receiver. My first guess would also be contamination before or during anodizing.


Can you feel scratches if you drag your fingernail across the lines? If so I don't think Cerakote would fill them - it goes on very thin.

[Rockit]

I could. Just never thought of cerkoting or painting since I thought black anodize is good enough protection. I might do that to these two if leaving them cause issue in the long run.

Won't cause any issues.
I would run them like that. If the looks bother you, top coat over the ano with cerkote or other paint.

[SweetPotato]

It looks like something was drug or wiped along the receiver, those lines are continuous from end to end. I don't think this is a flaw with the receiver. My first guess would also be contamination before or during anodizing.

Can you feel scratches if you drag your fingernail across the lines? If so I don't think Cerakote would fill them - it goes on very thin.

Yes, my fingernail is caught on the dots that make the line. I just don't understand how it only happens to part of two receivers and not the other 6 in the same batch.

Won't cause any issues.
I would run them like that. If the looks bother you, top coat over the ano with cerkote or other paint.

Good to hear that it won't rust and such. Yeah, the lines bother me but I probably won't paint or kote it over.

[jimbo74]

Yes, my fingernail is caught on the dots that make the line. I just don't understand how it only happens to part of two receivers and not the other 6 in the same batch.



Good to hear that it won't rust and such. Yeah, the lines bother me but I probably won't paint or kote it over.

looks like oil was introduced into the mix at some point.... oil does that to stuff

[Cadre]

Do you own a cat?

[SweetPotato]

looks like oil was introduced into the mix at some point.... oil does that to stuff

That being said, would re-anodizing bond to those open dot? They said that reanodizing would not cause those area to be anodized.

[Zartan]

Bummer! Strip them and carefully sand them smooth, choose a different anodizer or Cerakote them.

[Bigtwin]

I for one would just roll with it and use the tool!