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Painted lettering rubbing off vehicle. What's gone wrong?

Discussion in 'Hand Made Signs' started by The Jackdaw, Jan 5, 2020.

  1. The Jackdaw

    The Jackdaw New Member

    Nov 6, 2019
    I am a beginner and my first lettering on a vehicle has gone badly. One-Shot paint and very little thinning with white spirit. No hardener used.
    Painted outdoors (9C/48F during the day) with very high humidity at night.
    After 4 days, the paint had a nice gloss (so I believed I gave it enough time to dry before nightfall) and appeared hardened however it can be rubbed off easily with a dry cloth.
    Is this due purely to the temperature/humidity of application or is there something else at play here?
    I want to make sure I learn what I have done wrong before trying to find a heated workshop and start from scratch.
    The van is a metallic silver and I made sure the area was clean and dry before starting.
  2. kcollinsdesign

    kcollinsdesign Member

    Apr 22, 2007
    Normal, Illinois
    One Shot does not stick to modern vehicle finishes. Today most hand lettering is done with urethane paints applied on the base coat before the final clear is sprayed. Additives and adhesion promotors can be added to extend working time (urethane striping paints dry almost immediately; you must be fast) and help with adhesion, but you must experiment to come up with something that works for you and the specific finish you are painting on. Not for the feint of heart!

    You will also find the paint actually flying off your brush onto the surface (static) before you even put the brush down. Sort of like airbrushing with a striping brush and it can be difficult to control.

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  3. The Jackdaw

    The Jackdaw New Member

    Nov 6, 2019
    Thanks for the reply. Extremely helpful.
    You live and learn!
  4. visual800

    visual800 Very Active Member

    Aug 4, 2010
    montgomery, alabama
    I know a few pros still use One Shot but it is not what it once was. Before I stopped using one shot I was thinning with urethane reducer and using an automotive hardener in it but still the color did not last. You have to make sure your surface was squeaky clean also. IMO throw the one shot away and move to urethanes
  5. Gino

    Gino Premium Subscriber

    Jun 7, 2006
    One other thought, you shouldn't be lettering in less then 55° temperatures..... at least that was the rule of thumb years ago. If the high was only 55° it only got colder as nightfall came.

    If you had any pictures of it, it might help.
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