Derby Talk is a forum for Pinewood Derby, Awana Grand Prix, Kub Kar Rally, Shape N Race Derby, Space Derby, Raingutter Regatta and other similar races where a child and an adult work together to create a race vehicle and a lot of fun and memories
pwrd by tungsten wrote:Brasso is the new preferred polish...
Yeah!!! by Speedster,
You should see the car.. that he tried to inhance the Brasso polish shine with by useing,
zippo lighter fluid.. It melted the wheel bores right down to the axles on that car! (lol!)
Cool looking car and it's one of my faves by Speedster..
What type of automobile can be spelled the same forwards & backwards?
pwrd by tungsten wrote:Brasso is the new preferred polish...
What is the current theory regarding grit step size?
I was under the impression that the step factor should be about 2:1. That is, if I include polishing at 2000 grit (8 micron), my prior grit should be about 1200 grit (15 micron) and my next grit should be about 4 micron, then 2, then 1... If Brasso is less than 0.1 micron, then going from 2000 grit directly to Brasso is a factor exceeding 80:1, which seems to be a really large step factor.
What am I missing?
Stan
"If it's not for the boys, it's for the birds!"
pwrd by tungsten wrote:Brasso is the new preferred polish...
What is the current theory regarding grit step size?
I was under the impression that the step factor should be about 2:1. That is, if I include polishing at 2000 grit (8 micron), my prior grit should be about 1200 grit (15 micron) and my next grit should be about 4 micron, then 2, then 1... If Brasso is less than 0.1 micron, then going from 2000 grit directly to Brasso is a factor exceeding 80:1, which seems to be a really large step factor.
What am I missing?
A lot of folks seem to walk all the way up to 10,000 grit before final polish.
pwrd by tungsten wrote:So... Brasso is a nice final polish. How you get there...
Reading elsewhere suggested the jump 2000 grit to Mothers or Brasso. Musta misread.
I've been working (microns)
emery paper: 30, 15,
micromesh: 8, 4, 2,
diamond paste: 1.0, 0.5, 0.25
Need one or two intermediate steps to
Brasso: 0.03-0.05 ... because ratio is around 5:1 or 8:1.
Vitamin K wrote:I'm just way too time-strapped for that....
The folks who know wood seem to say skipping steps costs time (or finish!) Is finishing wood different than finishing metal?
Stan
"If it's not for the boys, it's for the birds!"
1. I learned to make sure I cleaned axles after using.
Brasso left over residue on axles. Graphite did not seem to like it.
I often found for me. It did not polish as well or much at all. With the harder steel axles.
pwrd by tungsten wrote:Brasso is the new preferred polish...
What is the current theory regarding grit step size?
I was under the impression that the step factor should be about 2:1. That is, if I include polishing at 2000 grit (8 micron), my prior grit should be about 1200 grit (15 micron) and my next grit should be about 4 micron, then 2, then 1... If Brasso is less than 0.1 micron, then going from 2000 grit directly to Brasso is a factor exceeding 80:1, which seems to be a really large step factor.
What am I missing?
So...does this mean that if I'm not gonna bother to step up to 10k grit, then I probably shouldn't bother with the polishing compound at the end?
Stan Pope wrote:
What is the current theory regarding grit step size?
... then going from 2000 grit directly to Brasso is a factor exceeding 80:1, which seems to be a really large step factor.
What am I missing?
So...does this mean that if I'm not gonna bother to step up to 10k grit, then I probably shouldn't bother with the polishing compound at the end?
Answering a question with a question is my job!
But in this case, my question comes from not knowing.
Stan
"If it's not for the boys, it's for the birds!"
1. I learned to make sure I cleaned axles after using.
Brasso left over residue on axles. Graphite did not seem to like it.
I often found for me. It did not polish as well or much at all. With the harder steel axles.
For sure clean in denatured alcohol after using brasso...
