ONR as wet sand lube?

K

KB in MD

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I have some leftover ONR solution from my last rinseless. Can I use it as a wet sanding lube? Or stick with car soap and water?
 
I try to only use clean distilled water for wet sanding. Never saw any reason to use anything else.
 
haris300 said:
I try to only use clean distilled water for wet sanding. Never saw any reason to use anything else.
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:iagree: I do not use distilled water. I might try that next time. As for ONR I wouldn't as IMO no reason to use it....+1
 
The purpose of water during wet sanding is to prevent the paper from loading up with removed paint

Some papers are stearated, which impregnates the paper with a lubricant

These papers will not benefit from additional lubrication and it could decrease their effectiveness.

I can't remember for sure, but i think 3M and Mirka discs are lubricated and Unigrit are not
 
Now that i think about it the lubrication point sounds right.
Thanks
 
The polymer lubrication in ONR will decrease the effectiveness of your sandpaper (this will not be apparent in lower grits but *might* be noticeable at 3000g and above).

Water usage during wet sanding is meant to provide lubrication and assist in dislodging spent paint from the sand paper media to avoid "clumps" of abraded paint from scouring the surface. If you add a few drops of car wash soap or even hair shampoo to the water it will further assist with keeping the sanding area clean.
 
The reasons you wouldn't want to use ONR in the sanding process is if you don't want to introduce polymers to the paint that could cause issues with an LSP bonding properly, and or the sanding media you are using, like Meg's sanding discs/pads, has a built in lubricant. Also, maybe there's a chance the polymers could mask some sanding marks and let you see the true results of a sanding step. Most of the things probably wouldn't cause major issues but, you really don't know until you try. So give it shot and see what you think. I have actually used it several times on small areas when I need a lube and didn't have distilled water on hand. It did, from what I can recall, cause the higher grits like 3000-5000 not to cut as aggressively, but that could be beneficial in some cases.
 
ShaunD said:
The reasons you wouldn't want to use ONR in the sanding process is if you don't want to introduce polymers to the paint that could cause issues with an LSP bonding properly, and or the sanding media you are using, like Meg's sanding discs/pads, has a built in lubricant. Also, maybe there's a chance the polymers could mask some sanding marks and let you see the true results of a sanding step. Most of the things probably wouldn't cause major issues but, you really don't know until you try. So give it shot and see what you think. I have actually used it several times on small areas when I need a lube and didn't have distilled water on hand. It did, from what I can recall, cause the higher grits like 3000-5000 not to cut as aggressively, but that could be beneficial in some cases.
Click to expand...

Not an issue, as the compounding and polishing steps will remove every trace of ONR
 
Absolutely. I was just playing devil's advocate for worst case scenario. I think the biggest thing is going to be how it would affect the sanding media if it already has a built in lubricant but, either way onr could help with squeegeeing the slurry and wiping the panel off.
 
OK, I beg to differ here. I have wet sanded on many occasions using ONR as lube and it performed beautifully.
 
May work....not necessary

If you are checking you work frequently, like when removing or matching orange peel, you want the surface to dry quickly after squeegee. I think ONR would slow the drying time
 
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