How do i sand an inside curved surface

Discussion in 'Materials' started by wet-foot, Jun 4, 2010.

  1. wet-foot
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    wet-foot Senior Member

    Are there any special sanders out there that can sand an inside curved surface?
    I am painting the interior of a marine shower with curved corners on the walls and would prefer not to have to sand this by hand. Will be applying 3 coats of primer and 3 top coats with sanding between each!
     
  2. TeddyDiver
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    TeddyDiver Gollywobbler

    Yes there is, like Fein (and some other brands) with a appropriate sander accessory. Some palm sanders reach quite well too to corners and of course a mini-belt sander..
     

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  3. Guest62110524

    Guest62110524 Previous Member

    easy really, shape a piece of timber and then staple paper to it
     
  4. Submarine Tom

    Submarine Tom Previous Member

  5. hoytedow
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    hoytedow Wood Butcher

    wire cup
     

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  6. SamSam
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    SamSam Senior Member

    You're probably going to have to do it by hand. You can use mattress type foam as a sort of block to help conform to the corners. The first sanding will be the hardest, in between prime and paint coats are quick and easy, more or less just smoothing out dust nibs and occasional bugs.
     
  7. Landlubber
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    Landlubber Senior Member

    ...I sometimes make sanding blocks from polystyrene foam, the hard stuff, it is shaped by sanding it with itself, and it can be shaped to suit the radius of the corner concerned, and does not really wear out all that fast. Covered with aluminium oxide frecut paper.

    no easy way mate, it is all hard work.
     
  8. SamSam
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    SamSam Senior Member

    That sounds even better. You could hold the sandpaper in the corner with the grit facing out, rub the block up and down until it was an exact fit, turn the sandpaper around and go at it.
     
  9. JPOP
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    JPOP New Member

    best way that i have found is to make a similar shape out of foam and then i mount it to my palm sander with sand paper over it......using duct tape to hold it on....it beats doing it by hand
     
  10. wet-foot
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    wet-foot Senior Member

    Yes copying the contour with reversed sand paper and rigid foam seems like what I need. will glue it the bottom of the palm sander. Even for the time it takes to do this process it should be much less time " and effort " than hand sanding. Appreciate the input. Now to get dusty, again!!!!!!!:rolleyes:
     
  11. hoytedow
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    hoytedow Wood Butcher

    I like this method.
     
  12. Landlubber
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    Landlubber Senior Member

    I like this method.

    ....I'll second that....clever thinking maye....ta
     
  13. wet-foot
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    wet-foot Senior Member

    Yah! should work good ........vill look like Arnold ven I done, much to sand. tanks so much:idea:
     

  14. DrCraze
    Joined: Apr 2010
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    DrCraze Junior Member

    I use a variable speed angle grinder with a flexible backer. I have them in 3", 4" 6" and a 10". Put since you are just prepping for paint and if the surface is smooth you only need to scuff it up a little use scotch brite. Most people don't realize the surface only needs to be scuffed up a bit.
    I wouldn't sand the top coats unless you let them fully cure/dry first depending on what you are using.

    What are you using?
     
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