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  1. #1
    Longskateaholic Thern's Avatar
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    Default wet sanding with polyurethane?

    How long does it take a coat of miniwax fast drying polyurethane to dry so i can sand and apply another coat?
    How many coats should i do?

    Thanks


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  3. #2
    Addicted Cruiser FBD's Avatar
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    Default Re: wet sanding with polyurethane?

    Depends what temperature you're in. It'll take a few hours in a cool basement or only less than an hour in the sun.
    “Some may never live, but the crazy never die” - HST

    Quote Originally Posted by GrassDiver View Post
    Do not become separated from the board, it is where you draw 'Stokeage Power', once separated, the 'Stokeage Power' is lost, and you become mortal.

  4. #3
    Longskateaholic Thern's Avatar
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    Default Re: wet sanding with polyurethane?

    Quote Originally Posted by FBD View Post
    Depends what temperature you're in. It'll take a few hours in a cool basement or only less than an hour in the sun.
    In the sun with low humidity and a breeze. =)

  5. #4
    Concrete Kahuna flannelman's Avatar
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    Default Re: wet sanding with polyurethane?

    Read the Can...
    Quote Originally Posted by scratch View Post
    Waking up to 100 emails with subjects like “climb the highest mountain... and punch god in the sack”, "staring down at the regular jackoffs, from space" & “when it's hard it don't bend and when it's soft it don't reach” is really strange for a partial amnesiac. Just say'n....

  6. #5
    Grandpa's Sporting Wood I Support The Fish
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    Default Re: wet sanding with polyurethane?

    Quote Originally Posted by Thern View Post
    In the sun with low humidity and a breeze. =)
    Are you using the spray cans or the brush-on stuff? The brush-on will take longer to dry 'cause you are laying on a thicker coat. The first coat will take longer to dry because a lot of it soaks into the wood. Dry to the touch [not tacky] is usually dry enough to re-coat but you want it drier than that before sanding it.

    With the conditions you describe, I'm guessing you can sand the first coat after 8-12 hours. Follow-on coats will dry much faster. The thing with polyurethane is that it will take a couple of days or more to fully cure to a hard/durable finish.

    Is your goal a mirror finish or just an OK finish for protection?

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    Fresh Fish Liquidtouch's Avatar
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    Default Re: wet sanding with polyurethane?

    [QUOTE=Thern;1298167237]How long does it take a coat of miniwax fast drying polyurethane to dry so i can sand and apply another coat?
    How many coats should i do?

    Thanks[/QU

    4-6 hours but I like to leave a day in between personally as thicker areas, high humidity and temp can alter that ALOT. And yes dry time vs cure time is very different. If your spending a lot of time to get a mirror finish then wait about a week before taking the board out to let it cure and reach its maximum hardness. For furniture and floors its recommended to wait 72 hours after final coat and avoiding heavy traffic.....I am currently in the process of coating a massive 11 foot long desk (on my second coat) I also used to work in a paint store..

  8. #7
    Addicted Cruiser afi1014's Avatar
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    Default Re: wet sanding with polyurethane?

    question :- what to do, if you want to put on the last layer of poly? because after i wet sanded it look flat then everytime i put another layer of poly its get uneven

    sorry for hijacking this post
    Quote Originally Posted by TM4RT View Post
    THE LONGBOARDER IS NEVER IN THE WRONG!!!

    Remember that and you'll be successful in life (and taking out the power-walkers with a swift coleman into their ankles:mrgreen:).

  9. #8
    Grandpa's Sporting Wood I Support The Fish
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    Default Re: wet sanding with polyurethane?

    Quote Originally Posted by afi1014 View Post
    question :- what to do, if you want to put on the last layer of poly? because after i wet sanded it look flat then everytime i put another layer of poly its get uneven

    sorry for hijacking this post
    Three options:

    1. Thin the poly about 50 percent and wipe on the final coat wiith a lint-free cloth. [cheapest]

    2. Spray on the final coat. [easiest]

    3. Wet sand with increasingly finer grits 'all the way to 1500 grit then use polishing compound. [nicest]

  10. #9
    Concrete Kahuna flannelman's Avatar
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    Default Re: wet sanding with polyurethane?

    Quote Originally Posted by Roj View Post
    3. Wet sand with increasingly finer grits 'all the way to 1500 grit then use polishing compound. [nicest]
    shoot, i go past that. i sand down to 3000.
    Quote Originally Posted by scratch View Post
    Waking up to 100 emails with subjects like “climb the highest mountain... and punch god in the sack”, "staring down at the regular jackoffs, from space" & “when it's hard it don't bend and when it's soft it don't reach” is really strange for a partial amnesiac. Just say'n....

  11. #10
    Stoked! Cruel's Avatar
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    Default Re: wet sanding with polyurethane?

    Doesn't matter if you go to 3,000. You'd probably have to go up to 12,000 grit to get shine back to an acceptable level using just wetsanding. You probably aren't going to get a perfectly even finish without buffing, but buffing takes some patience and know how. Without that, you probably aren't going to get a perfectly scratch free finish.

    My tip- After buffing, use the shiniest car wax you can on the bottom of the board. Turtle wax is a good brand, but quite a few work well with the poly you're buying at hardware stores. It'll help with *some* of the minor scratchies that appear in buff jobs before you get the hang of it. Use microfiber clothe for wiping down.

    And to answer your question, I have no idea how long the fast dry stuff takes, but 8 hours is what I would give it. If you're using spray on, spray on 3 layers at a time, with 15 minutes-30 minutes in between each spray.


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