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Re: First time wet sanding kit - #3000 & #5000 Trizact Sanding Discs
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Super Member
Re: First time wet sanding kit - #3000 & #5000 Trizact Sanding Discs
Why the soap in the water bottle Mike? Will you stock Trizac in the 3 inch?
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Re: First time wet sanding kit - #3000 & #5000 Trizact Sanding Discs
Mike, do you need several discs to get you through sanding a car? How do you tell when they are worn out? Thanks
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Super Member
Re: First time wet sanding kit - #3000 & #5000 Trizact Sanding Discs
I just had a demo with our 3M rep. and was told one disc shout last an entire vehicle. I have been using these for a few years and was using to much water and would use two per vehicle. That is why Mike mentioned damp sanding and not wet sanding. You will know the disc has stopped cutting when a. you no longer see clear in your water b. notice it isn't cutting when you squeegee off a section you've sanded and it does not match previous sections.
Edit: The recommendations I gave on how long a sanding disc should last was for a recently painted vehicle.
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Super Member
Re: First time wet sanding kit - #3000 & #5000 Trizact Sanding Discs
Another practice i have adopted is to dedicate MF towels to wet/damp sanding removal. Even though i try to cleam them thoroughly i don't trust them again on freshly polished paint.
May just be me but to me working clean is almost surgically clean! The last thing i want to do is grab what i thought was a clean MF towel and undo what i just jewelled. My wet/damp sand MF's are kept completely seperate.
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Super Member
Re: First time wet sanding kit - #3000 & #5000 Trizact Sanding Discs
Originally Posted by Puckman
Another practice i have adopted is to dedicate MF towels to wet/damp sanding removal. Even though i try to cleam them thoroughly i don't trust them again on freshly polished paint.
May just be me but to me working clean is almost surgically clean! The last thing i want to do is grab what i thought was a clean MF towel and undo what i just jewelled. My wet/damp sand MF's are kept completely seperate.
Are the MF for cleaning the surface pre or post your buffing process?
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Re: First time wet sanding kit - #3000 & #5000 Trizact Sanding Discs
Originally Posted by 7PaintGuns
Why the soap in the water bottle Mike?
Helps lubricate the surface as you sand, slow down water evaporation and it also helps to prevent the face of the sanding disc from clogging up with paint.
Originally Posted by 7PaintGuns
Will you stock Trizact in the 3 inch?
We already do. We've carried 3M and Meguiar's 3" and 6" for year now, just not the 5" Trizact #3000.
We also have Mirka Abralon in 3" and 6".
I show using 3M Trizact and Meguiar's Unigrit sanding discs in my 3-day ACR class and Mirka Abralon discs in my boat detailing classes.
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Re: First time wet sanding kit - #3000 & #5000 Trizact Sanding Discs
Originally Posted by 7.3powerstroke
Mike, do you need several discs to get you through sanding a car? How do you tell when they are worn out? Thanks
Yes. You can tell they have worn out by the lack of white color in your water slurry and when you wipe the paint off to inspect you can visually see the surface is not being sanded as fast as it was when you first started out.
Originally Posted by 7PaintGuns
I just had a demo with our 3M rep. and was told one disc shout last an entire vehicle.
Of course the size of the vehicle will be a factor.
Originally Posted by 7PaintGuns
I have been using these for a few years and was using to much water and would use two per vehicle.
Too much water creates hyper-lubrication and a lack of sanding and usually your discs last longer. Too little water creates a lack of lubrication and very fast sanding that wears out the disc prematurely plus it will load up quickly with the paint you're sanding off.
Originally Posted by 7PaintGuns
That is why Mike mentioned damp sanding and not wet sanding.
That is the correct term because you use a lot less water than when wet sanding. In this article from 2010, hard to believe it was 6 years ago, I defined the terms,
Color sanding
Wet sanding
Damp sanding.
Then I showed how little water is used by taking a picture of my 32 ounce spray bottle of water that started out full and after all the sanding I had only used half the bottle of 16 ounces of water to machine damp sand the entire 1969 El Camino.
Here's a quote and a picture from the article, look at the water level in the spray bottle.
Originally Posted by Mike Phillips
Remember, it's not wet sanding it’s damp-sanding
I took the below picture after completely sanding down a 1969 El Camino. Note the water level in the clear spray bottle.
Only 16 ounces of water used to sand an entire 1969 El Camino
It's a lot less messy than traditional wet sanding with a sponge or rag in a bucket of water or a Wet Wedge.
Originally Posted by 7PaintGuns
Edit: The recommendations I gave on how long a sanding disc should last was for a recently painted vehicle.
Definitely top coat hardness is a huge variable and generally speaking, a fresh paint job, even after a few weeks old will still sand and buff easier and faster than a factory baked on OEM paint job or a repaint that is a few years old.
For those interested, here's an old 2-door Chevy my co-worker Matt and I sanded down and buffed out 6 years ago.
1956 Chevy Bel-Air - Dampsanding, Cut & Polish
Here's a quote and a picture from this project...
Originally Posted by Mike Phillips
We started at 9:16AM, and finished around 9:42AM. Under 40 minutes to damp-sand an entire car this big, and we only used (2) sanding discs (1 each)!
For everyone reading this into the future if you don't know a lot about wet sanding, or dry sanding or damp sanding or color sanding keep in mind, the majority of all this type of work is done on repaints from collision shops or custom paint jobs on project cars.
You don't normally want to do any sanding to new cars with a factory paint job because the paint is too thin and sooner or later you'll make a whoops!.
Keep in mind that,
Sanding removes paint
Compounding removes paint
Polishing removes paint
And while it's real easy to sand and buff the larger flat panels as soon as you get into tight area, thin panels, around corners, edges or trim it's a lot trickier to remove your sanding marks. Sanding is easy... that's putting scratches into the paint... the tricky part is getting them 100 percent out of the paint.
For more information on the topic of wetsanding, PLEASE read this article,
Wetsanding - Fresh Paint vs Factory Paint
And for those that are curious... "yes" the old 2-door Chevy came out nice.
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