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  1. #1
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    Too much sanding?

    White Oak. Sanded 150, then 180, then 220 and then 340 before staining.

    Stained and found 2-3 spots that I missed, there were pretty obvious scratch marks. So after it dried, I sanded the finish off and started sanding again, this time at 220, then 340.

    Re-stained, and it seems to be taking forever to dry. Stained about lunch time Saturday. Sunday evening it is still a bit tacky. It is in the heated shop at about 73 degrees.

    Stained some other boards [at the same time as the top] that I only sanded to 220 and they are nice and dry. Thoughts? Too much sanding or could the previous stain that I sanded off somehow be affecting it?

    Either way,I think it looks nice!

    Do you think the poly will have problems adhering to the surface?

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    Re: Too much sanding?

    It does look nice I must say. I'll also say that it's not necessarily too much sanding but way too fine a grit. It just isn't necessary. We like to feel that ubber smooth surface before finishing but 180 grit before finishing is all it takes. The smoothness comes from the finish itself.

    Besides, too much sanding leaves a horrible uneven surface even though it feels good to the touch.

    [edit], The poly is a chemical bond. You'll be fine. The humidity is keeping your stain from drying. Just give it more time.
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  4. #3
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    Re: Too much sanding?

    No expert here, but I always stop at 220. I knock finishes down with 320 between coats.
    Always be yourself because the people that matter don't mind, and the ones who mind, don't matter.

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  6. #4
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    Re: Too much sanding?

    David,
    Did you use something to fill the pores?

    If so, then I agree that the stain may simply need more time to dry.
    “Think about it: Everything with a power cord eventually winds up in the trash.” John Sarge, timber framer and blacksmith instructor

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  8. #5
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    Re: Too much sanding?

    Quote Originally Posted by Hmerkle View Post
    David,
    Did you use something to fill the pores?

    If so, then I agree that the stain may simply need more time to dry.
    No, I didn't fill the pores. Just sanded, stained, saw that it wasn't sanded good enough in 1-2 spots [had some cross grain scratches], so I sanded the stain off and started over. .

    I checked it this morning and it seemed pretty dry. I put it closer to the mini-split and set the blade so that it didn't swing and was pointed towards it. I think it will be ready for some assembly/poly this evening.

    Thanks!

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    Re: Too much sanding?

    Yes, you've sanded too much and that wasn't necessary either. Here's my hypothesis to consider. Even though a pigment stain is on the surface it still needs to penetrate a bit and oversanding effectively burnishes the surface making it less permeable. So the stain and the petroleum solvents sit on the surface and are slow to dry.

    Stained some other boards [at the same time as the top] that I only sanded to 220 and they are nice and dry.
    Be patient, it'll dry in time.

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  11. #7
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    Re: Too much sanding?

    I think when you re-sanded you may not have gotten off all the old stain. Oil-based stain can be slow to dry when it can't fully penetrate the wood. Much like putting it on a finished surface.or putting it on too heavy. As for sanding, I have found that the finer grit you sand, the lighter the stain result. I have sanded white oak to 400 and gotten stain to take, but only in the softest part of the wood. Haven't had any problems with the top coats adhering or curing after the stain did dry, though.

    It does look nice.

    Go
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    Re: Too much sanding?

    By using a card scraper you avoid all those problems. Sand between coats of varnish scrape the raw wood. A scraper cuts the surface of the wood leaving a clean, smooth substrate for the varnish to adhere. Sandpaper scratches and fuzzes the surface.



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  15. #9
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    Re: Too much sanding?

    I gave some white oak flooring that was left over from a new home a few years back. He very precisely laminated it into a nice workbench top. Then the sanded it, finishing up with an 800 grit abrasive. What he did not realize was that once he started using a sandpaper finer than 220 grit that he was essentially burnishing the wood. When he tried to stain it, it barely took any stain and it was blotchy. After sanding it again with 220 grit, it took the stain well and produced a nice finish.

    Pete

    Quote Originally Posted by DSWalker View Post
    White Oak. Sanded 150, then 180, then 220 and then 340 before staining.

    Stained and found 2-3 spots that I missed, there were pretty obvious scratch marks. So after it dried, I sanded the finish off and started sanding again, this time at 220, then 340.

    Re-stained, and it seems to be taking forever to dry. Stained about lunch time Saturday. Sunday evening it is still a bit tacky. It is in the heated shop at about 73 degrees.

    Stained some other boards [at the same time as the top] that I only sanded to 220 and they are nice and dry. Thoughts? Too much sanding or could the previous stain that I sanded off somehow be affecting it?

    Either way,I think it looks nice!

    Do you think the poly will have problems adhering to the surface?

    Pete - KD4CQZ

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  17. #10
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    Re: Too much sanding?

    I always sand to the "EYE". In other words, I focus on the grain when I sand and remove the scratches before I move to the next grit. Focus on the grain, the scratch or the "haze" and your sanding will go much better in the future. Sanding to "TOUCH" is really not enough.
    Neil

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