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CBass · Joined: 03 Nov 2002 Posts: 2807 Location: Vancouver, Canada

My 931 spoiler is getting pretty old, and is fairly porous and spongelike at this point, so I'm looking at options to make it waterproof, and hopefully black and glossy.

Who has had good experience in reconditioning their spoilers, and what have you guys used?

I'm thinking that Meguirs "Back to Black" would be fine for getting it to look nice, but I want to stock it from being a sponge, since it gets very heavy when wet.
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'81 931 in various states of assembly

Vince Ponz · Joined: 02 Nov 2002 Posts: 3581 Location: Florida

I have had three 931 spoilers in my hands and all of them were spongelike. Try to get a 924S spoiler if you can. Might be better.
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"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock

Joes924Racer · Posted: Wed Jul 27, 2005 11:26 am Post subject:

I dont know what youd use to fill so its not so porous.
mines still in good shape... have to think of that one n ask around.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

CBass · Joined: 03 Nov 2002 Posts: 2807 Location: Vancouver, Canada

I was thinking some sort of latex based sealer might be the trick here. If it's porous and absorbs water, it should be able to absorb a flexible paint too, at least on the surface.

Just a few thoughts to kick around... Anyone recommend anything that fits the bill here, flexible, stick to rubber, that kinda thing?

Also, is regular paint thinner safe to use on teh rubber? I have a spare spoiler in ratty condition, so I can use it for a test bed for this.
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'81 931 in various states of assembly

Joes924Racer · Posted: Wed Oct 19, 2005 5:39 pm Post subject:

*bump*

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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

DS-777 · Joined: 16 Sep 2005 Posts: 134 Location: Michigan USA

Are you planning on painting it? I used some autmotive glaze to fill small holes on some rubber honey-comb wheels for a '71 GTO, and it worked out beauitfully, but the trick is you have to paint it.
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Gone: 1981 silver 924 w/ black int. and a 5 speed.

Smoothie · Posted: Sun Oct 23, 2005 4:45 am Post subject:

Have a look here - http://www.924board.org/viewtopic.php?p=88499
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"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

wuilman · Posted: Sun Oct 23, 2005 1:24 pm Post subject: spoiler

i read that link and there is a black rubberized flexible bondo. we used it on a couple of vettes in the body shop, but ill be dammed if i could remember the name. it is very rubbery but i dont know how it would react with the spoiler. ive gone with the fiberglass approach but ive only gotten as far as taking off the spoiler and cleaning it up.........i gotta get off my ass
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wonder what this button does.......oh!

My924gtc · Joined: 14 Aug 2004 Posts: 1362 Location: 248

You might try SMC. I use it for mounting rear flares and such.

This is the stuff I have. About $25 for the size shown.

It comes in black too which is good for ease of finish on the spoiler. Sands out a little tougher than lightweight bondo but still capable of a nice smooth finish.

I have a POS 931 spoiler I may just have to cream up and see how it goes.

wuilman · Posted: Sun Oct 23, 2005 5:19 pm Post subject:

that smc stuff sounds like kitty/gorilla hair (bondo with fiberglass strands chopped into it) and if it is you paid too much.
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wonder what this button does.......oh!

numbbers · Posted: Fri Oct 28, 2005 9:45 am Post subject:

Well, when I restored my first spoiler, I purchased a can of tire black from JC Whitney. It is a rubber paint that is designed for brushing, but can be sprayed. However, I would think that bumper paint, available at any autoparts store, would work also.
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1980 924 Turbo