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'Yellowed' white Kashimax. How do I get it back to white?

#1 2009-08-20 4:53am

nickswan1
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'Yellowed' white Kashimax. How do I get it back to white?

Hi,
Need some advice. I have a white Kashimax Aero that has lost it's zing. It's yellowing hmm
How do I bring it back to bright white cool without ruining the decals on it?
Bleach soak?
Any good products out there?
Cheers
Nick

Last edited by nickswan1 (2009-08-20 4:54am)

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#2 2009-08-20 4:57am

maximum85
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

put it in the sun light and bleach it naturally,it takes some time,but you will see the progress..

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#3 2009-08-20 5:00am

nickswan1
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

I live in the UK, what's sun light? lol
I'll give it a try, thanks.

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#4 2009-08-20 5:07am

maximum85
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

then bring it to a tanning salon lollol

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#5 2009-08-20 5:55am

nickswan1
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

I put it out in the sun and the wind blew it away! big_smile

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#6 2009-08-20 7:20am

Earwick66
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

i'm not sure if bleach would work but you may try some hydrogen peroxide.(and again..i don't know if this would work but it's worth a shot)

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#7 2009-08-20 11:39am

M1.30-06
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From: Chandler, AZ
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

The back sticker will die if you soak it - but since the back sticker is lame I am sure you peeled it off and trashed it.

The lettering on the side will not get damaged USUALLY. I have had some fade/peeling on old seats that I let soak/dye to long.
You can bleach the seat - be careful  ..or you can dye it another color (THIS is what i do with old "white" seats).

The sun bleach method - I LIVE IN PURE SUN - not sure how this came about, but it has never worked for me. I left a "white" skyway on my roof half a summer, did not do crap.


Jesus Palomino, a Nazi. I knew it, you're all in cahoots.

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#8 2009-08-20 1:05pm

1979
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

I have had this DB seat sitting around for about 20 years just getting worse by the day. Thought about bleaching it but the rails are starting to rust and liquid bleach can do some ugly stuff to bare metal, even if you grease it before dipping. I considered removing the rails but that's always a risk of cracking the seat. Sun bleaching will cause plastic to dry up and become brittle, again increasing the chances of cracking. So it just sat because I didn't like any of those options. I read in the forums here that Soft Scrub is recommended for cleaning white mags and tires so I picked up a bottle the other day to try on a set I have that need cleaning. Then I read this post and it reminded me of this nasty yellow seat I had buried somewhere and  I figured if Soft Scrub works on mags, why not a seat? The lettering was already starting to fade from age/use so with nothing to lose I gave it a shot.


1st pic: Before
http://i279.photobucket.com/albums/kk145/1979_photos/dbsc/dbsc.jpg


2nd pic: After applying a thin coat of Soft Scrub just to see if it would harm the lettering. I let it sit for about 5min. After removing the cleanser I noticed that the letters were unharmed and the left side of the seat was a shade whiter, without any scrubbing.
http://i279.photobucket.com/albums/kk145/1979_photos/dbsc/dbsc1.jpg

3rd and 4th pics: These shots are after applying more Soft Scrub and putting a little elbow into it. I just used a rag to work it in. It dries up kind of quick, becoming thick like toothpaste first and eventually crumbles and falls off, taking some filth with it. Applied a bit more and this is how it turned out after a few minutes work. I may have lost a little of the lettering, but I'm sure that's my own fault for rubbing too hard and not because of the Soft Scrub "eating" away at the paint.
http://i279.photobucket.com/albums/kk145/1979_photos/dbsc/dbsc2.jpg
http://i279.photobucket.com/albums/kk145/1979_photos/dbsc/dbsc3.jpg

5th pic: Just a comparison of the cleaned side vs. the untouched side
http://i279.photobucket.com/albums/kk145/1979_photos/dbsc/dbsc4.jpg




Will this DB seat ever be as nice as it was when new, just using Soft Scrub, I doubt it. But it has made a major difference compared to other chemicals that I've tried, such as degreaser, 409, simple green, etc..., and I am content with the results.  Maybe this could be an option for you if your seat has not yellowed as badly as this one. Try at your own risk and do not rub anymore than necessary around the lettering. Or take the easy route and just buy a new one tongue .  - Good Luck.


It's yours. Do what you want with it smile

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#9 2009-08-20 4:01pm

nickswan1
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

Many thanks.
A new one....Kashimax.....hmmmm! Maybe not big_smile
Not rubbing too hard....can probably deal with that wink

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#10 2009-08-20 6:17pm

StevenFS98
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From: Columbus, OH
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

I was thinking about this stuff last night because my bike is near my computer and I was looking at the seat. I used Mr Clean Magic Eraser and it made some improvements. There are some scratches on the back with some dirt mixed in. I rubbed and rubbed but it basically just shredded up the Magic Eraser since the scratched plastic was so coarse. I am happy with the results for the most part, but I ended up seeing a good "Buy It Now" deal on ebay so I bought another seat!

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#11 2009-08-20 7:08pm

jimmied
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From: Mullica Hill, NJ
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

either find the sun, a tanning bed or a strong uv light kit.  All will get it bright white again.

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#12 2009-08-20 8:10pm

StevenFS98
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

How long do you estimate sitting it in the sun? M1 above left his stuff out for much of the summer and he says it didn't make a difference. I let something out for just a day, flipping it every few hours, and I DID see a difference. Eventually I'll do this with my seat.

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#13 2009-08-20 9:43pm

jimmied
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

it took me a 2 or 3 weeks on a seat i had.  Only a few days for some other parts like pedals, epoch headset.

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#14 2009-08-21 6:46am

StevenFS98
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

Thanks. When I get my new seat, maybe I'll drop the other one off in the backyard for a week or two.

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#15 2009-08-21 12:15pm

nickswan1
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

Ladies in the local tanning shop thought I was weird putting a seat in the booth for a 30min session big_smile big_smile big_smile

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#16 2009-08-21 12:50pm

fulfillment
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

i wonder if oxy clean would work well with this? has anyone tried that stuff?

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#17 2009-08-21 1:38pm

StevenFS98
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

I've haven't. The problem is I don't think people are into experimenting too much. You have a chance of ruining something.

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#18 2010-10-17 5:02pm

O.S.T.
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

I thought I would share the results I had with bleaching a white seat. I started by soaking it in pure white vinegar for 30 min & gently rubbed of the rust with fine steel wool afterwords. I rinsed it out properly with water & scrubbed with a brush & some detergent to get some of the grime & dirt off.
I tried soaking the seat in pure bleach at first but the rails on the seat started loosing more of the silver/chrome. It seems like it was getting worse around the areas that already had some issues, as if the bleach penetrated more those areas. So I took it out & decided to coat the rails with vaseline & I soaked the seat in bleach for 3 hours. The bleach did not whiten the seat one bit. What it did do was remove the silver Kuwahara lettering similar to that Diamond Back. So all in all bleaching a seat made of these types of materials does not seem to have a positive result. Hopefully someone comes up with a solution.
neutral
Before
http://i259.photobucket.com/albums/hh286/zapp10304/seattop2-1.jpghttp://i259.photobucket.com/albums/hh286/zapp10304/seatlow3.jpg
After
http://i259.photobucket.com/albums/hh286/zapp10304/SDC11927.jpghttp://i259.photobucket.com/albums/hh286/zapp10304/SDC11920.jpg

Once again, the before & after could have been reached without the bleach & the only difference would be that the Kuwahara lettering would still be silver. So it did NOT work.

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#19 2010-10-17 5:05pm

O.S.T.
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

If I manage to finally find some of that elusive Soft Scrub, I'll try to post the results.

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#20 2010-10-21 3:30am

jimmied
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From: Mullica Hill, NJ
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Re: 'Yellowed' white Kashimax. How do I get it back to white?

once again, the best approach is some uv light from the sun...or a tanning salon if you are metro...haha

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