New Large Advent (NLA) Speakers With Beat Up Walnut Cabinets

Pete B

AK Member
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I bought these NLA speakers at such a low price that it was a bargain just for the woofers and
I'm using the walnut veneered boxes as practice for a quick refinishing job. Part of the reason
for this is that I find most walnut Advents to be too brown and often with a red tint that I really
do not like. It seems to me that the color is in the top coat and not really in the wood, but I
know very little about this. I also have some much nicer speakers with various issues, water
mark, similarly scratched, etc.

Plan to move fast on these so I'll probably use our orbital sander for much of the work, I do not
ever plan to do this on speakers that I value.

The plan below has been revised after getting expert advice from General Finishes tech
support that is listed in post 21 below with the title AFTER SOME RESEARCH. Please
disregard the plan below:
The plan is:
0. Wipe down with mineral spirits to remove dirt and grime.
1. Glue down lifting veneer
2. Sand with 150, then 220 to remove much of the finish probably with an orbital
3. Wipe down with mineral spirits to remove sanding dust, and/or with a tack rag.
4. Raise the wood with wet cloth and iron for large scratches
5. Fill gouges, luckily so far I only see a few that matter to me
6. Not concerned about how the bottoms come out but they are good for practice
7. Not concerned about chips along the bottom or back, will use a stain pen to darken them
8. Plan to use Watco Danish Oil in Dark Walnut, sand in first coats, brown paper for final coats
9. Optional is to use Minwax Antique Oil after final coat - is this compatible with the Watco?
10. Will probably top them with Howard's Feed and Wax

Not concerned if this is a complete failure since it is just a learning experience and they can
serve as workshop or garage speakers or give aways in the end.

I learned about shellac, stain, varnish, and wipe on products as a young kid around 12 years old.
Stained some of my early speaker projects, don't remember exactly how I did them.

Fast forward doing nothing up until about 20 years ago got a pair of Dynaco A-25 s cheap that
looked very beat up. Not knowing about the super thin veneer issue, hit them with our Porter
Cable orbital sander and fine sand paper. I tried to work fast and take the minimal amount off,
didn't burn through and they came out looking amazing. I have a vague memory of using
Minwax stain with Watco Natural Danish Oil on top - used what we had in the shop.

Please let me know if I'm way off on this, advice is appreciated.

Front, I've never seen grilles so brown with age:
100_1511.JPG

Right side:
100_1516.JPG

Left side:
100_1514.JPG

Tops - started sanding one:
100_1519.JPG

Bottoms - should have started sanding here:
100_1518.JPG

Long edge chip along back, plan to use a stain pen to darken the white wood:
100_1524.JPG

Front - not much of interest, 5 foam blocks in each. It is interesting that the blocks
do not completely fill the box a bit more could be used or even better fiberglass:
One crossover has rockwood resistors and these are known to fail. Every Advent
I've seen with a failed resistor has been rockwood brand.
100_1513.JPG

Back - not much to see:
100_1515.JPG
 
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Pictures of one top where the veneer is bubbling. Veneer is raised about 1/32" and
is splitting. Plan to slit it along the grain and push/inject carpenter's glue in there,
then clamp: Is there a better way to fix it?
100_1523.JPG

Straight edge, does not really show the lift:
100_1522.JPG

After cleaning with mineral spirits a round ring can be seen where the veneer is bubbling,
probably plant was left there and leaked water.
 
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Picture of lifted veneer along the bottom, already glued back down with exterior carpenter's glue:
Small chips at the bottom darkened with a stain pen.
100_1517.JPG
 
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One bottom sanded, is this ready for Watco Danish Oil?
It lightened up fast and this is what made me believe that the color was more
on the surface but I have no idea how Advent finished these.
Will probably practice with wet cloth and iron for scratches:
100_1525.JPG
 
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You're on the right track. Looks good.

One thing I do with large chunks of veneer missing is splice in similar wood veneer. Once you finish it, won't be able to tell. Those bulb nose are my favorites.

Good luck!
 
One bottom sanded, is this ready for Watco Danish Oil?
It lightened up fast and this is what made me believe that the color was more
on the surface but I have no idea how Advent finished these.
Will probably practice with wet cloth and iron for scratches:
View attachment 2608181
If you go at them with 400-600 grit they will have a beautiful sheen when oiled and dry.
 
A few observations:
The veneer lightens up fast with just a bit of sanding. I started with 120 grit
by hand. The front molding did not lighten up much at all, it is probably solid
and takes in more color coat - a pure guess.

Edit: the above was true for one speaker, the molding on the other turned quickly to a
very light wood after sanding. These were made to a tight budget and it is possible
that they used whatever "good enough" wood was available at the time.

Two coats of Watco Dark Walnut on the sanded bottom. No attempt was made to fix
any of the scratches since it is the bottom. Not bad if you like the distressed look, but
actually I don't like it at all. Note the dark molding:
100_1526.JPG

Based on the above I'll guess that Advent used a tinted toner as a top coat in order to
better match the molding to the veneer. Perhaps it also hides much of the differences
in grain between different veneer.
I think that I'll have to also use a top coat to get any reasonable match.
 
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These chips are bad and located top front, but not that large, if I can find some
old walnut I might try a splice but I don't have any right now. I'll at least tint it but
being in the front a splice would be better:
100_1528.JPG
 
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Contrary to advice, I used an orbital sander and got it right down to the bare wood all the way around. I did sand only with the grain, never against it.
 
Did it take a lot of work to get the color to match all around? Anything special to
get the molding to match?
 
Regarding the brown grills: they remind me of the walls in my father's old house that were stained from his smoking. Is the stain on the cloth or the Masonite?
 
Age stained. I think that the thorough sanding with heavy to light paper was the answer to the tone evenness. I may have held off some density of the stain on the bullnose, but I don't really remember as that was quite a long time ago. I still have them but they are just stored until I take to selling some stuff. Why I put them in the top shelf in the garage, I'll never know.
 
I think that gel stain is the way to go in order to get a more even finish.

Finishing walnut with General Finishes Nutmeg Gel Stain, at 18:30, wash with oxalic acid before that:

General Finishes Antique Walnut Gel Stain at 7:17:
 
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