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Thread: 3 "interior" questions for anyone

  1. #1

    3 "interior" questions for anyone

    I'm putting in new door WELTS and a new marine plywood subfloor. I've
    run into some things.....
    1- The insulation material behind the lower sidepanel right seat side
    (what in a car we'd call a KickPanel I think) was removed by someone
    in the past. Can I replace it with dowcorning fiberglass building
    insulation?
    2- The plastic ceiling panel surfaces have become very sticky to the
    touch. I scrubbed them with mineral spirits when I first got the plane
    6 yrs ago and it did work, but I was concerned with the possibility of
    damaging the plastic with this chemical. Have you had this Stickiness
    develop and how did you treat it? (And do you know WHY this occurs?)
    3- The Welt material (some call it windlace) was glued to the
    underlying metal with contact cement. Hard to remove. Folks at AirTex
    tell me that this is not necessary, that the screws and trim will hold
    it in place. Are they right, or do I need to glue up the Welt?
    Thanks to everyone
    -Dave






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  2. #2
    Guest
    Guest

    3 "interior" questions for anyone

    1. Dow Corning is not FAA approved, but who would complain. Just to keep your I.A. happy, you may stick with an FAA approved (burn tested/rated) insulation. Aircraft Spruce has a variety. Besides that old fiberglass holds on to water like crazy.

    2. Don't know, sorry. Hair gel? My car suffers from a localized sticky spot due to my height.

    3. They're right about the windlace. I put it in with both glue and screws. The screws hold, glue comes loose during my annual. I just reposition it when I reinstall the panels and let the screws hold the windlace.

    Joe

    [Non-text portions of this message have been removed]



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  3. #3

    3 "interior" questions for anyone

    I inspected a Cardinal some years ago that had a sticky ceiling. We
    came up with many creative ideas about what might have caused it, but
    never really figured it out. (Didn't buy the plane, either.)

    The most likely cause in my opinion was cigarette smoke from the past
    leeching out of the plastic panels as they outgas. Another possibility
    was a manufacturing flaw in the chemical recipe that made up those
    particular panels, causing them to degrade over time, probably aided by
    the heat that gets concentrated at the top of the cabin.

    good luck! let us know if you figure it out.


    >
    > 2- The plastic ceiling panel surfaces have become very sticky to the
    > touch. I scrubbed them with mineral spirits when I first got the plane
    > 6 yrs ago and it did work, but I was concerned with the possibility of
    > damaging the plastic with this chemical. Have you had this Stickiness
    > develop and how did you treat it? (And do you know WHY this occurs?)
    >
    > .
    >
    >


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  4. #4

    3 "interior" questions for anyone

    I can't pretend to know with any certainty what causes this. My personal suspicion is that it is related to plasticizers working out of the plastic; I have experienced the same thing on many other aged vinyls. Oddly enough, it seems to be more prevalent on vinyls in shielded storage, more so than those in full sun and higher heat. Maybe the plasticizers collect on the surface on the former, but evaporate away on the latter. But I really don't know.

    I can suggest a two-stage treatment. Westley's used to market a plastic and vinyl cleaner that something like 'methasylicates' in it. It has since been taken off the market in that packaging; apparently because it could actually streak or stain glass, and was hard on unprotected skin. However... the same stuff is still being sold as 'Westley's Tire Brite', or something similar. It is an excellent vinyl cleaner; the best I have ever found. Particularly when applied using a Scotch-Brite pad. It contains no solvents that attack the plastic. You scrub the vinyl with it, and rinse with water.

    Then you flood the vinyl (not just lightly wipe the vinyl) with ArmorAll (or the equivalent). Let the wet ArmorAll sit overnight, then wipe off any remaining excess which has not soaked into the plastic

    If you will be painting the vinyl with Molecubond (available from Spruce), skip the Armorall. Instead, clean the vinyl a second time with Ajax powdered cleanser (or the equivalent), rinse it thoroughly, and towel it dry with a clean towel. Let it finish air drying at least overnight, then paint it. When proper prep (and application) is done, the Molecubond blends with the plastic, and won't chip off.

    If you think that the sticky vinyl is bad, wait until the first time you open a drawer-full of plastic-handled tools which have been closed up for a couple of months. Hold your nose....


    ________________________________________
    From: musketeermail@yahoogroups.com [mailto:musketeermail@yahoogroups.com] On Behalf Of Jefro
    Sent: Tuesday, August 15, 2006 2:09 PM
    To: musketeermail@yahoogroups.com
    Subject: Re: [musketeermail] 3 "interior" questions for anyone

    I inspected a Cardinal some years ago that had a sticky ceiling. We
    came up with many creative ideas about what might have caused it, but
    never really figured it out. (Didn't buy the plane, either.)

    The most likely cause in my opinion was cigarette smoke from the past
    leeching out of the plastic panels as they outgas. Another possibility
    was a manufacturing flaw in the chemical recipe that made up those
    particular panels, causing them to degrade over time, probably aided by
    the heat that gets concentrated at the top of the cabin.

    good luck! let us know if you figure it out.

    >
    > 2- The plastic ceiling panel surfaces have become very sticky to the
    > touch. I scrubbed them with mineral spirits when I first got the plane
    > 6 yrs ago and it did work, but I was concerned with the possibility of
    > damaging the plastic with this chemical. Have you had this Stickiness
    > develop and how did you treat it? (And do you know WHY this occurs?)



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