Hello, guys. I have a question. From time to time I see boomboxes at auction with stains on speakers. For example:


Do you know ways how to delete this stains? Also does it possible at all?
Thanks for you answers, Michael

bleach works pretty good.

several approaches possible: bleaching, acrylic paint or fabric spray paint.

I tried acrylic with some good results on some white sharp speakers. Also tried standard spray paint on my 777 which worked just fine. Only needed a really light coat so i dont think you even need fabric paint. Personally i'd stay away from bleaching but some members have had really good results. peace

Thank you very much for your answers.
Can I get step-by-step description of bleaching, acrylic paint or fabric spray paint technologies? Please.

I repainted my Gf-9494 speakers using acrylic paint and I'm pleased with how they came out, heres the recipe:

What you need:



Get a brush around a 13mm (1/2 inch) wide, preferably a flat one like the one above. You need a nice flat edge for even coverage, rounder ones are less precise, especially around speakers edges.

For paint use an acrylic/guache. I love Jo Sonja's paints, they thin beautifully and mix really well. For these speakers use Warm White (a slightly off-white colour that's a lot less harsh as a normal white) and Brown Earth. Also get some All Purpose Sealer (water based, preferably Jo Sonja's).

Craft/Art supply shops should stock all these, using other brands won't change anything too drastically.

Take your radio apart and check the back of the speakers for what their original colour is. Now mix up the paints, sealer and a tiny amount of water (dampened brush is probably enough) to the right shade. Test it by putting a little on the back of the speaker and seeing how it dries.

As a rule you'll find you want to make it up slightly darker than the actual speaker colour as it'll lighten as it dries due to the porous nature of the speaker cone. Mixing in the sealer will thin the paint and make it dry super colourfast so it won't fade over time and also dry with the correct finish. You can experiment with different amounts to see what looks the best of course too.

When you're happy with the colour the thin (but not watery) paint to the speaker cone in a circular motion going around and the dust cap then outwards. The paint should go on evenly, if theres brush marks it's too thick and if the stains underneath show through then it's too thin. Don't stress too much if you get any paint on the silver dustcaps or surrounds as it's easy to rub off once it's dried. Acrylic paints are always easy to remove from non-porous surfaces as a rule, use an pencil eraser or something similar.

Apply the paint as evenly as possibly and make sure you let the whole speaker dry before deciding if it needs another coat.

This is how I repainted my 9494 speakers, the results are pictured below:




Hope this makes sense and works out for you.



Rock On.

Thanks you very much.
Very nice technology. But what about sounding after painting using acrylic paint procedure? Is it stay the same, not worse?
Also I;m interested in bleaching technology.
Somebody can describe how to do that?
Thanks, Michael

Here's my write-up I did on bleaching:

http://stereo2go.com/eve/forums/a/tpc/f/8596027254/m/44...441089144#4441089144

A few have used the technique with success.

The sound on mine was not affected at all. I'd say as long as the paint is thin and evenly applied there should be no difference to the sound whatsoever.

even though I'm not an expert with painting but I do agree with gluecifer. a tiny ply of paint won't make a big difference in terms of how the speakers sounds.. and this is because the main source of sound doesn't come with the speaker wall but rather the sounds comes within the magnetic field and the enbobinado not sure what is the word for english. but hopefully the main idea has been expressed.