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Old 01-05-2013, 08:05 AM   #1
pkboxer OP
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Painting Fork Lowers/sliders

I know I've seen some painted fork lowers/sliders on /5 or /6 airheads.

I'm considering it and wondering if people who did it have any advice.

First thing that came to mind was if I should sand them smooth rather than painting over the "texture" of the cast finish.

If painting them offends you please just shake your head and move on.
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Old 01-05-2013, 08:24 AM   #2
Biebs
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Pissed painting offends me!!!

"If painting them offends you please just shake your head and move on."


I will not stand idley by and see these artriocities occur on my watch!! I will fly out to Ohio and take a can of whopass on you!~!


OK now your problem is fixed I feel better.



Seems that you will have to etch or use a special primer on the Aluimuim fork sliders to have a paint adhere.


Ok now I need to get over the fact that you are taking a BMW that was delivered from the factory in perfect condition and modifying. - Please consider UJM as an option. I know Ohio winter can be boring but get a life!!
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Old 01-05-2013, 08:25 AM   #3
Renner
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sanding smooth sounds like a lot of work to me.
Just how cold & snowy is it out there?

Do you have spare sliders to experiment with?
I'd guess a pair could be had cheap.

If you go with removing the textured finish of the casting, would you also remove that "casting flash" sort of vertical rib that runs up the back of the slider?

Seems to me you could go all or nothing... pretty much whatever you like.
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Old 01-05-2013, 10:47 AM   #4
bmweuro
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Clean them really well with a mag wheel cleaner or Purple Power using a green Scotch pad, wipe down with Alumiprep, warm them up either in the oven at a very low temp or put them in the sun fr a while and give it 2 good coats of paint. It will last for many year before you ave to re-due it or touch them up.
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Old 01-05-2013, 11:53 AM   #5
pkboxer OP
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The winter's just begun

Thanks all.

I think I'll go the non-sanding route and follow bmweuro's advice.

I image I could even clean the paint back off if it isn't what I want but I think I paid $30 for this set of them so it's not a case of "no turning back"

Sorry to come out on the offensive. Seen too many questions get no answers and just lots of personal opinions.
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Old 01-05-2013, 03:30 PM   #6
Renner
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Quote:
Originally Posted by pkboxer View Post
Sorry to come out on the offensive. Seen too many questions get no answers and just lots of personal opinions.
not at all... totally know what you mean

what color?
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Old 01-05-2013, 05:05 PM   #7
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heat gun

Quote:
Originally Posted by bmweuro View Post
Clean them really well with a mag wheel cleaner or Purple Power using a green Scotch pad, wipe down with Alumiprep, warm them up either in the oven at a very low temp or put them in the sun fr a while and give it 2 good coats of paint. It will last for many year before you ave to re-due it or touch them up.
I painted the fork sliders on my '86 R80 a few years ago. Cleaned them as BMWEURO described and hung the sliders up in the garage door. I used a good heat gun to preheat the sliders be warm to the touch and applied several light coats, 4 or 5, with a little preheat in between coats to keep the sliders a little warm. (pretty warm to touch, but not too hot to hold). The result as a pretty durable paint coat that has withstood 6 years of mostly year round commuting and still looks good. I use a similar method on my valve covers.

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Old 01-05-2013, 05:55 PM   #8
mattcfish
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Quote:
Originally Posted by JZed View Post
I painted the fork sliders on my '86 R80 a few years ago. Cleaned them as BMWEURO described and hung the sliders up in the garage door. I used a good heat gun to preheat the sliders be warm to the touch and applied several light coats, 4 or 5, with a little preheat in between coats to keep the sliders a little warm. (pretty warm to touch, but not too hot to hold). The result as a pretty durable paint coat that has withstood 6 years of mostly year round commuting and still looks good. I use a similar method on my valve covers.

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What about powder coating?
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Old 01-05-2013, 11:31 PM   #9
Zodiac
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Mine were almost weathered white from losing their original black paint.

One night removed the wheel, fender, calipers, reflectors, etc.

Wiped down the the sliders with simple rubbing alcohol.

Didn't even prime them - just sprayed em with Krylon semi gloss premium black.

Looked brand new, year later, still do.



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Old 01-06-2013, 12:09 AM   #10
boxerboy81
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This was done last September...

Advice given was that if I lightly sanded back the original paint, that the new paint would adhere well enough to it. I had already sanded past that point, so off to the local paint shop with the part.
They sold me these to etch prime, then paint.


Etch prime: 2-3 light coats, one hour apart. Lightly sand in between. I used 1200 w&d.
Paint: 3 light coats ensuring adequate cover each time. Light sanding in between. I used 1600 w&d.

It's been cold and wet here lately, temps at 12-14C, rain, fog etc. Not ideal painting weather. So I set up a dual halogen lamp thing that I have (throws out some warmth) and hung the parts about 2 feet away for a wee while. Sprayed the paint on and left them hang with the warm lights on. They've come up well so far. I've completed the black too, but the last picture will be the finished job on the bike.




Complete. I'm happy with the result, but time will tell if it's been done well enough.

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Old 01-06-2013, 02:23 AM   #11
TINK
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Unpainted

I went the opposite direction and had the black paint on my 1979 R100RT (PROJECT-S) sand blasted as I prefer the natural look of the bare aluminum.


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