Author Topic: Rock Chip Paint Repair  (Read 152 times)

Offline cappy102

  • Posts: 53
    • CLC Member
      CLC Member #30926
  • Name: Mark Butterworth
Rock Chip Paint Repair
« on: December 04, 2017, 05:21:50 PM »
One of the projects Iím getting ready to tackle is the repair of numerous chips in the paint on the hood. This youtube video demonstrates an approach that beats using a toothpick for applying the paint:

https://www.youtube.com/watch?v=Uz-zW-cLdUs

Tool: Loew-Cornell #92 Fine Line Painting Pen

This tool is available on Amazon for around US$22 or from Dick Blick Art Supplies for under US$9 (www.dickblick.com/).

Hope this might be of use to fellow members.
1957 Cadillac Coupe De Ville
1981 Moto Guzzi V50 Monza

Offline Mike Josephic CLC #3877

  • Posts: 1508
    • CLC Member
      CLC Member #3877
Re: Rock Chip Paint Repair
« Reply #1 on: December 04, 2017, 08:58:09 PM »
Thanks for posting this info.  I never saw this gadget before (the fine line
pen).  I normally used a very fine camel hair brush.  However, this is useful
information.

The process looks like it would work for a few small chips but it appears
it could be really tedious if your whole hood had numerous chips.  Then
it's time for a repaint.

I was also surprised that they didn't level out all of the small "dabs" with
a quick 2,000 grit wet sand followed by a light polish. Leaving it as it is,
in daylight it would look like the hood had chickenpox.  However, in the
museum most likely nobody will notice.

One last thing -- did you notice what happened when he put the "pen"
into the isopropanol solution?  Not much of anything.  Clean it with lacquer
thinner instead to do the job.  Isopropanol won't work very well.

Mike
« Last Edit: December 04, 2017, 09:01:27 PM by Mike Josephic CLC #3877 »
1955 Cadillac Eldorado
1973 Cadillac Eldorado
1995 Cadillac Seville
2004 Escalade
1997 GMC Suburban 4X4, 454 engine, 3/4 ton
custom built by Santa Fe in Evansville, IN
2011 Buick Lucerne CX
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Offline cappy102

  • Posts: 53
    • CLC Member
      CLC Member #30926
  • Name: Mark Butterworth
Re: Rock Chip Paint Repair
« Reply #2 on: December 05, 2017, 11:45:41 AM »
Thanks for your comments, Mike...yes, I would definitely go over the touched up area with wet 2000 to knock down the bumps.

One thing that was not mentioned is preparing the metal at the bottom of the chip. Seems like some sort of rust-preventive chemical (Ospho, for instance) might make the repair longer lasting. Not sure how Ospho would react with the original paint, though.

I did not remember the isopropanol, but for spray nozzles, etc, lacquer thinner (in a well-ventilated environment) is probably the best way to get things clean. Acetone might also work with some paint and is less toxic.

mb
1957 Cadillac Coupe De Ville
1981 Moto Guzzi V50 Monza

 

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