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General control line discussion => Open Forum => Topic started by: Juan Valentin on February 17, 2009, 05:46:14 PM

Title: Nitrate paint
Post by: Juan Valentin on February 17, 2009, 05:46:14 PM

  Can castor oil be added safely to nitrate to reduce the amount of shrinking? I have added castor oil to butyrate with no problems but was wondering about using it on nitrate for areas that don`t need the shrinking quality of this paint but still want to use it to fill the grain.
                                                                                      Juan

Title: Re: Nitrate paint
Post by: billbyles on February 17, 2009, 09:49:45 PM

Quote from: Juan Valentin on February 17, 2009, 05:46:14 PM

  Can castor oil be added safely to nitrate to reduce the amount of shrinking? I have added castor oil to butyrate with no problems but was wondering about using it on nitrate for areas that don`t need the shrinking quality of this paint but still want to use it to fill the grain.
                                                                                      Juan

Hi Juan,

While I imagine that the reason you asked about plasticizing nitrate dope is because you have the tautening type on hand, nitrate dope is readily available in non-tautening.  When I use nitrate (admittedly not often and then mostly on full-scale airplanes) if I have only tautening nitrate on hand I use good old Dave Brown's "Flex-All" to plasticize it.  Works fine and even on a full-scale airplane it doesn't take much. 

Title: Re: Nitrate paint
Post by: Juan Valentin on February 18, 2009, 06:09:36 AM

   Thanks guys I`m just trying to avoid the starving horse look in a fuse with compound curves and light wood.
                                                                                  Juan