Reanodizing an 80%

[apes]

Hello,
1.Can you reanodize a anodized 80% receiver that has had the last 20% removed so as to harden all the new holes/openings that were created in the milling process.

2.Does the old anodizing need to be removed ( is it possible) first.

3.If the anodized 80% receiver is going to be etched does the anodizing need to be removed on the areas to be etched prior to etching and then can you anodize over it
Thanks
CP

[Hk996]

I did this with badicedog and we had to re-anodize our receivers because we first did a shiny polish on them and that made them glossy after anodizing. We had them strip off the anodized stuff and then took them in to get them bead blasted.

We didn't need to remove anything prior to etching the sides.

[apes]

Could you have beadblasted the shiney ( +annodize) receiver to remove the shine, then reannodized it this time annodizing the inside and the holes that were drilled out in order to remove the last 20%?
Thaks
CP

[RRichie09]

I'm assuming you already bought one and milled it out?

[docflash]

Hello,
1.Can you reanodize a anodized 80% receiver that has had the last 20% removed so as to harden all the new holes/openings that were created in the milling process.

2.Does the old anodizing need to be removed ( is it possible) first.

3.If the anodized 80% receiver is going to be etched does the anodizing need to be removed on the areas to be etched prior to etching and then can you anodize over it
Thanks
CP

You can reanodize a receiver if you remove the anodization first. You can strip with commercial stripper or you can use a lye solution. One potential problem is that you can over-strip because the stripper removes aluminum. You leave it in there long enough and you won't have a receiver. Done carefully, you should be able to remove mostly just the surface layer. Still, I would measure the holes in the fire control pocket to make sure they're still in spec.

The old anodization definitely needs to be removed before re-anodizing because anodized aluminum doesn't conduct electricity. If it won't conduct electricity, it won't anodize.

If you're going to etch, you should do it before anodizing. If you're electroetching, the piece needs to conduct electricity or it's a no-go. If you are chemically etching somehow, the surrounding anodized surface would be affected since it's almost impossible to etch exactly what you want to etch. There's always a little bleed that will affect the surrounding surface.

When all else fails, ask Vaderspade. He's the resident anodizing expert on the board. http://www.calguns.net/calgunforum/s...ght=vaderspade