Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 9 of 9

  1. #1

    Join Date
    Jan 2008
    Location
    Hoover, AL
    Posts
    15
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    sealing balsa before final sanding

    is it a good idea to fill the balsa with balsa filler before final sanding for appling monicoat? is there a problem with the balsa filer and the heat used to appie the monicoat?

  2. #2

    Join Date
    Apr 2008
    Location
    Houston, TX
    Posts
    274
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: sealing balsa before final sanding

    Hi everybody,

    I have a question to add to alabamaflyer's question (it is similar). Somebody in our club said that you really want to get a smooth and good adhesion of either ultracote or monocote, use something like Kryon gray primer and sand it. Another person said that you can also use hairspray (extra hold) since it is a laquer. Any thoughts?

    Happy flying and soft landings!
    Ultrasport Brotherhood #35

  3. #3

    Join Date
    Apr 2003
    Location
    Hemderson, NV
    Posts
    13,277
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: sealing balsa before final sanding

    Yes, you use the filler then sand, if you still have low spots fill some more and sand. Just watch out, balsa sands very easy and you can sand it to the point you can read through it.
    The trick to getting a good covering job is making sure the balsa is clean and free of dust. I don't use anything special on the wood but I have tried the hair spray and it works pretty well, not needed but it works. I have never tried or heard of anyone using primer before covering so????
    First blow off the plane with air, then I use a stiff paint brush and hit it with air again then wipe the plane realy good with a tack cloth, the tack cloth is found in any paint store or hardware store in the paint section. Now just cover. For the most part the covering sticks to itself so you want to have about a 1/4 inch of over lap.
    I use the Ultracote and like it a lot better then the mono but that topic is like opening a can of worms here, it's also been debated to death, do a search and you will see what I mean.
    Drinking and driving are illegal, why do bars have parking lots
    Daisy Air Guns, keeping kids off your lawn for 100 years

  4. #4

    Join Date
    Apr 2003
    Location
    Hemderson, NV
    Posts
    13,277
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: sealing balsa before final sanding

    I'm sorry, I read sealing and my brain locked into filling, an old age Brainfart, my bad.
    I have never bothered using sealer on the wood before covering but I do seal before glassing. No real reason for it for covering but if you do seal and sand no problem, the covering will stick with or without it.
    Drinking and driving are illegal, why do bars have parking lots
    Daisy Air Guns, keeping kids off your lawn for 100 years

  5. #5

    Join Date
    Aug 2004
    Location
    jacksonville, FL
    Posts
    2,102
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: sealing balsa before final sanding

    Don't use GREY primer. It changes the color of the covering. I put yellow over grey primer and it looks greenish. Where the primer was sanded down to the wood the covering looks yellow. Plane looks like heck but I'm not going back and change it.

  6. #6
    bps's Avatar
    Join Date
    Oct 2002
    Location
    Indianapolis, IN
    Posts
    1,333
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: sealing balsa before final sanding

    I like to use a sanding sealer just before final sanding with a very fine sandpaper. It makes the balsa surface just a bit tougher and more resistant to the little dings we usualy get. I now use a latex product available at Michael's Craft Stores (and other Craft Stores) called ModPodge. Works well for me.
    JEB
    Giant Scale P-47, Knight Twister, 33% BD-8, 40% Gee Bee Z, 25% Dr1, 25% Clip Wing Cub, #45 Bud Nosen 310 Club

  7. #7
    Phlip's Avatar
    Join Date
    Nov 2002
    Location
    Auburn, MA
    Posts
    635
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: sealing balsa before final sanding

    ORIGINAL: Gray Beard

    I'm sorry, I read sealing and my brain locked into filling, an old age Brainfart, my bad.
    Not really your fault. The title of the thread is "sealing," but the first post straight off says "filling." These are not the same! When I cover a model with one of the plastic films, I make sure to fill low spots in sheeted areas, or dent's and dings, with white or tan spackle paste. But I see no reason to fill the grain of the balsawood in general. Sealing the balsa before the final sanding helps to get the fine fuzz off, and it does help the film to stick better, but I don't see it as essential. I've used hairspray or thinned white glue with a brush, and they both work fine. I wouldn't use a paint primer. In addition to the color problem already mentioned I think that would add too much weight and not enough benefit.

    Phil
    Phil, Waco brother #144
    If the truth were self-evident, eloquence would be unnecessary-Cicero

  8. #8

    Join Date
    Dec 2001
    Location
    Upplands Vasby, SWEDEN
    Posts
    7,371
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: sealing balsa before final sanding

    Hi!
    Adding anything to the balsa surface prior to using Oracover (Ultracote in the US) or any other plastic covering is useless and only makes it harder to fasten the film.

    There is one exception to this though! And that is when you have a sanded, glass fiber covered, balsa surface where you have used polystyrene plastic to secure the glass fiber weave...then the plastic film stays put like crazy when you apply it with an iron (ironing is the best method when covering).
    Jan Karlsson - Supplier MVVS Products

  9. #9
    aerofly0610's Avatar
    Join Date
    Nov 2008
    Location
    Green Bay , WI
    Posts
    402
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: sealing balsa before final sanding


    ORIGINAL: jaka

    Hi!
    Adding anything to the balsa surface prior to using Oracover (Ultracote in the US) or any other plastic covering is useless and only makes it harder to fasten the film.

    There is one exception to this though!

    What about fuel soak balsa?... could use balsa rite for that our just sealing before covering.
    Team Jesus Freak
    Yup you can love God AND airplanes... life is great
    Vet USAF B52 Crew Chief 00-04


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 05:55 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.