Titanium, "Brushed" vs. "Polished" finish?

Titanium, "Brushed" vs. "Polished" finish?

Post by dougjuli » Mon, 17 Jan 2000 04:00:00


I've heard that brushed finish is much easier to maintain than a
polished finish? What extra maintenance is required (if any), and does
the polished surface degrade (e.g. scratch) over time?

Polished looks much sharper but it does tend to cost more (Litespeed
charges $200 to polish their frames). Is the extra money worth it in
the long run, or is is a waste due to the excess wear?

Thanks,

D. Taylor,
Southington Ct

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Titanium, "Brushed" vs. "Polished" finish?

Post by Yeti M » Mon, 17 Jan 2000 04:00:00

Ti frames will get some marks on them with heavy use, but generally do
much better than paint or bare aluminum.
 The polish looks classy, and takes a bit of labor to achieve (YOU could
always try to polish it yourself if you think the added price is
excessive :)
 The advantage of the brushed finish is that if (when) it does get some
scratches in it, you hit it up with some Scotchbrite, and its as good or
better than new. (Your decals might not like it though).

 Short answer, brushed is easier to mantain.  

     Quantum Mechanics.... The dreams stuff is made of.

 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by Brian Nystro » Tue, 18 Jan 2000 04:00:00

Quote:

> I've heard that brushed finish is much easier to maintain than a
> polished finish?

True. All you need to do is hit it with a little Scotchbrite (which is what the
manufacturers use) and it's as good as new.

Quote:
> What extra maintenance is required (if any), and does
> the polished surface degrade (e.g. scratch) over time?

Polished finishes scratch easily and show fingerprints and other stains readily.
You will find yourself cleaning and polishing frequently.

Quote:
> Polished looks much sharper but it does tend to cost more (Litespeed
> charges $200 to polish their frames). Is the extra money worth it in
> the long run, or is is a waste due to the excess wear?

It's a complete waste of money, unless you absolutely have to have the "chrome
look". It also causes glare on sunny days. Put the $200 into better components.

--
Regards

Brian

 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by Robert Gf W » Tue, 18 Jan 2000 04:00:00

There's this wonderful stuff available at Auto supply stores: one brand
is called "Never Dull," and other is (well, duh) "Ever Bright." Both come
in a can, and are cotton wadding ***d with polish/cleaner. You
just tear off a bit (I reuse stuff) and rub/buff your bike. It cleans,
polishes, buffs, removes tar, bugs, rust, corrosion, etc. Wonderful for
brushed titanium (haven't tried it on polished), and great for all other
metal parts. Supposedly non-toxic. I wipe my bike down every other ride,
as it only takes a minute or two. If not lazy, I buff it.
 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by THolland » Tue, 18 Jan 2000 04:00:00

Quote:
>Robert Gf Woo writes:

<< There's this wonderful stuff available at Auto supply stores: one brand is
called "Never Dull," and other is (well, duh) "Ever Bright." Both come in a
can, and are cotton wadding ***d with polish/cleaner. >>

"NEVR DULL" comes in a dark blue can, and it does work great on Ti.  However,
it smells like some *** VOC's in there, and it might not be too healthy to
use this stuff every other day.  

I recall reading somewhere (Merlin?) that a brushed finish is better than
polished for fatigue strength.  That's different than their "radial textured"
spec, which refers to the microstructure.  Anyhow, Merlin's Titanium Primer,
<http://SportToday.org/; is a fantastic resource for Ti
questions.  Check it out.  

Todd H.  

 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by Gocyc » Tue, 18 Jan 2000 04:00:00

I own a polished Litespeed Classic.  I use aproduct called WENOL. which
I found on the web.  This product makes the bike look brand new. Beats
Mother's any day.

Luigi

Quote:
}}}}}GoCycle}}}}}

 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by David L. Johnso » Tue, 18 Jan 2000 04:00:00

Quote:

> I recall reading somewhere (Merlin?) that a brushed finish is better than
> polished for fatigue strength.  

That seems specious.  I gather they sell --- brushed frames?  I know that
glass derives strength from surface properties -- smooth surface being
stronger than etched (this was advanced as one of the reasons why all those
windows used to fall out of that high-rise in Boston), but metal is a
different animal.  However, I?certainly wouldn't expect brushed surfaces to be
stronger for any reason, for the same mass/square inch.

--


Department of Mathematics  http://www.lehigh.edu/~dlj0/dlj0.html
Lehigh University
14 E. Packer Avenue       (610) 758-3759
Bethlehem, PA 18015-3174      

Some people used to claim that, if enough monkeys sat in front of enough
typewriters and typed long enough, eventually one of them would reproduce
the collected works of Shakespeare.  The internet has proven this not to
be the case.

 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by Robert Gf W » Tue, 18 Jan 2000 04:00:00

: >Robert Gf Woo writes:
:
: << There's this wonderful stuff available at Auto supply stores: one brand is
: called "Never Dull," and other is (well, duh) "Ever Bright." Both come in a
: can, and are cotton wadding ***d with polish/cleaner. >>
:
: "NEVR DULL" comes in a dark blue can, and it does work great on Ti.  However,
: it smells like some *** VOC's in there, and it might not be too healthy to
: use this stuff every other day.  

Well, the can says it is non-toxic, if one wants to believe them. It does
have a smell, but so doesn't anything else that I can think of to polish
metal. It even suggests using it to polish silverware. I guess most of
this stuff should be used in vnetilated area, and when in doubt, I use
cheap surgical gloves also. This stuff keeps components spiffy, too.
:
: I recall reading somewhere (Merlin?) that a brushed finish is better than
: polished for fatigue strength.  That's different than their "radial textured"
: spec, which refers to the microstructure.  Anyhow, Merlin's Titanium Primer,
: <http://SportToday.org/; is a fantastic resource for Ti
: questions.  Check it out.  
:
: Todd H.  
:
:

 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by Damon Rinar » Wed, 19 Jan 2000 04:00:00

Quote:

> I recall reading somewhere (Merlin?) that a brushed finish is better than
> polished for fatigue strength.  

Can you find that reference?

It goes counter to all I know about fatigue, including the stem fatigue
testing I witnessed at Holland Cycles (see
http://damonrinard.com/stemtesting.htm) in which the polished stem
lasted more than double the raw stem.

Damon Rinard

Damon Rinard's Bicycle Tech Site:
http://www.damonrinard.com/

 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by Willy-Y » Wed, 19 Jan 2000 04:00:00

On Mon, 17 Jan 2000 21:34:43 -0500, "David L. Johnson"

Quote:

>I know that
>glass derives strength from surface properties -- smooth surface being
>stronger than etched (this was advanced as one of the reasons why all those
>windows used to fall out of that high-rise in Boston), but metal is a
>different animal.

Metal can also change its properties through surface manipuation.  Do
a search on "shot-peening".  That said, I haven't a clue which finish
of Ti is stronger, but given the nature of Ti used in bikes it may
never be a relevant question--things that will damage a frame will
likely damage a frame of either finish.

Willy-Yam

 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by Brian Nystro » Wed, 19 Jan 2000 04:00:00

Quote:


> > I recall reading somewhere (Merlin?) that a brushed finish is better than
> > polished for fatigue strength.

> That seems specious.  I gather they sell --- brushed frames?

This is typical of Merlin's "technical" information. They dismiss anything they
don't sell as unnecessary or detrimental - polished frames, 6/4 tubing,
tapered/shaped tubing, etc. Take everything they say with a HUGE grain of salt.

--
Regards

Brian

 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by John Carrie » Wed, 19 Jan 2000 04:00:00

Quote:
> This is typical of Merlin's "technical" information. They dismiss anything
they
> don't sell as unnecessary or detrimental - polished frames, 6/4 tubing,
> tapered/shaped tubing, etc. Take everything they say with a HUGE grain of

salt.

I agree.  I think that the majority of the "technical issues" surrounding
the materials in a frame are just hype.  If it's solidly constructed, the
correct geometry, meets expectations for ride quality (whatever that is) and
is of reasonable weight ... it's more than good enough.

As to finish, all have some advantages and disadvantages ... assuming
aesthetics is a concern.  Bead blast requires the least care, but looks a
bit too industrial.  Brushed is fairly easy to keep up with Scotchbright.
Polished looks very cool, but may take more work to maintain its new finish.

Major gripe against most Ti frames is that the decals get dinged-up easily.
(Solution:  paint/clearcoat ... then you get chips and scratches).  Just out
of curiosity, does anybody know if Litespeed's painted bikes have clearcoat
over the decals?

R / John

 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by Gary Helfric » Wed, 19 Jan 2000 04:00:00

: I recall reading somewhere (Merlin?) that a brushed finish is better than
: polished for fatigue strength.  That's different than their "radial textured"
: spec, which refers to the microstructure.  Anyhow, Merlin's Titanium Primer,
: <http://merlinbike.com/primer_history.html> is a fantastic resource for Ti
: questions.  Check it out.  

It is more of a fantastic source of bullshit than anything else.  

If polishing metal is so detrimental, why are fatigue specimens polished in
a very controlled fashion before being subject to testing?  

In real life, there is NO difference in the fatigue life between brushed and
polished titanium frames

Gary Helfrich
Arctos Machine

 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by Fiamme R » Thu, 20 Jan 2000 04:00:00

i've been reading the thread and it seems that most you "ti" owners are for the
brushed finish.   i've also noticed some ti frames have a beadblast finish,
anything positive or negative about this type of finish?

                                                -tom

 
 
 

Titanium, "Brushed" vs. "Polished" finish?

Post by Ground Zer » Thu, 20 Jan 2000 04:00:00

Bead blasting hardens the surface of the tubing and eliminates microscopic
surficial cracks, making for a slightly stronger frame. Since, most frame
failures occur in the weld zone, the benefits are neglible. Bead blasting is
less expensive (less labor intensive) than brushed and polished finishes.
Therefore, ti manufacturers like to hype its benefits.

Stuart Winsor
Ground Zero Cycles


Quote:
> i've been reading the thread and it seems that most you "ti" owners are
for the
> brushed finish.   i've also noticed some ti frames have a beadblast
finish,
> anything positive or negative about this type of finish?

> -tom