Polyspan and Water Based Polyurethane

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    Roger LaPrelle

    After a 17 year hiatus, I am returning to FF flying. How things have changed in 17 years. I walk into a Hobby Shop and don’t recognize much of anything. I am curious about Polyspan and water based finishes. Nelson Hobby Specialties sells an interesting sounding water
    based finish, but the same finishes can probably be purchased at your favorite Big Box Chinese Import store. Has anyone tried these finishes over Ployspan? Has anyone found a dye that will work with water based finishes? Looking forward to flying again. Regards…

    Roger LaPrelle
    Olympia, WA


    Hi CapnRog

    I know it is an old post but can partly answer your question re: Polyspan and water based polyurethane finish.
    I have not tried it with nitro fuel but it is diesel fuel resistant having just finished a new sport model covered in polyspan. The water based polyurethane paint (clear) I used was purchased from a ships chandlers (supply boat stuff) and required an activator to set it off and was brushed on. One tip: use nitrate dope for tightening the polyspan and lightly rough the coverd surface with well worn 600 grit Wet & Dry as the polyeruthane tends to pool (like water on a waxed surface) if the surface is too shiny.

    Hope this helps

    Ployd in OZ

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