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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
I have a pair of C75 speakers, (small, around 1980 vintage) which I would like to restore.
They have a brushed aluminium casing, which looks pretty ordinary at the moment. I suspect they were coated with something to protect the finish, but the coating is now the problem.
Anyone know how I can safely remove the coating to expose (and clean) the brushed aluminium underneath?
Thanks,
Mike
The problem will be that this is probably anodised. Not completely sure about this though! I would suggest rubbing them down and them spray painting them as I doubt you will get a decent finish any other way. A nice matt silver should do.
Peter
Eeergh!!! They're not THAT bad! :) I'll grant you that they are anodised, no doubt. But it looks like they have been coated with something to "preserve" the finish. Unfortunately, that "preservative" coating is what now looks a bit crappy, and I'd like to (safely) remove it without damaging the anodised aluminium finish underneath... OTOH, you've just given me the germ of an idea! Some auto spray paint, in a colour of my choice, carefully applied, could look good. (I often use auto touch-up spray for metal hifi equipment covers that have deteriorated...) Thanks for that!:)Mike
Use a sanding block like I did and see the results for my CX50's and 100's!
Brengen & Ophalen
Wow! :) Yes!!!
Details please! What type of sanding block? Method? Tips?
Please!!!
They look fantastic!
Mike, it's just a matter of upgrading from a lower to a higher grid (sanding) rate.
Don't use loose sheets, that won't work! Sanding to be done in a straight direction, don't swirl!
Stripes can be made again by using transparent lacquer. Just tape it off.
Would like to see pictures from your's, before and after
Well, it's been some time, but I did get around to sanding the speakers. Unfortunately, I lost the nice "stripes" on the side. But they do look much better!
Unfortunately, they show fingerprints like you wouldn't believe!
Now, since they look good, I'd like to replace the drivers. Speaker drivers have come a long way in the last few years, and I feel I should be able to find something at least as good quality as the originals, even if the sound isn't "authentic".
Can anyone point me towards a schematic, or at least advise me of the crossover point?
Not too complex! You can get drivers for these apparently though this was a little time ago. I was told they were quite a lot more expensive than the ones for the CX100.As Leslie says, if you want stripes, mask the speakers till just showing the area you want the stripe and spray with lacquer. The fingerprints was why I suggested painting them!They will also corrode if you are not careful.
Thanks. Will try to blow up and print the image so my poor old eyes can read it! Nothing too occult there.
Have thought about painting them, but would use auto touch-up because I have used it before, and know how good it can look.
Thanks for the help!
No way mine gets fingerprints because I'm using a sort of spray furniture wax that has to dry and stays fingerprintfree even after touching it. Wasn't it you Peter who suggested me to use vinyl stripes of Ebay long time ago? This is fantastic stuf which I use for many purposes e.g. white sides Beogram 4500 or RL speaker sides etc.
ps. I got myself a few pairs of aluminium CX100's and 50's which will have the same treatment and I show you (again) what the result will be!
At the same time I'm restoring a pair of RL35's, RL2000, RL140 (fantastic) RL6000. Result of what I did with these will be placed in a new thread!