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Old 06-27-2006, 07:19 AM
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How to fix sag in clearcoat?

I have painted my hood with arclic enamal.
I was applying the clear coat and was finished.
I had a little clear left in the gun and decided to not waste it and applied it
to the hood.
As a result I have an over a foot long sag in the clear coat.
The hood is for a 53 Stude coop and it is not flat.
This was my third lap on the hood , the sag is a result of wanting to use up the remaining paint - huge mistake.

I have never before made this mistake and would like to know
how to remove the sag.
What grade sandpaper to use?
Hand sand?
Sand the entire hood?
Re-apply cear?

Thanks for the advice.
Paul

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Old 06-27-2006, 09:03 AM
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Quote:
Sand the entire hood?
================================================== ========

Whatever you sand, you will have to buff. If you sand and buff just the hood, it wont match the rest of the car as it will not have any orange peel.
Assuming you don't plan on sanding and buffing the entire car, I'd say sand the hood with 600 grit and then reapply the clear.
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Old 06-27-2006, 09:36 AM
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I would use some 1500 and block that area.just that area and then buff to see if I can save it..

Anyway moving to body exterior..

Sam
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Old 06-27-2006, 10:37 AM
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With acrylic enamel, the longer you let it cure the better, as far as
sanding the sag and buffing.
I'd try that first.
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Old 06-27-2006, 11:02 AM
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You'll need something to back up your sandpaper, a block, or stick to keep the paper from just rounding over the run. The razor blade scraper method for run removal can also save some time-do a search here on run removal. Is the clear an enamel or urethane? Enamels will take longer to cure before any sanding and buffing is done. If you don't want to buff just remove the run with 600 grit wet and apply more clear.
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Old 06-27-2006, 11:16 AM
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If it were me,I would guied coat the run,then block it with 400,with a hard block.After the run is gone,block it with 1000,then 1500,then buff it.Than way,if yo burn it,at least the run is gone and it wont be hard to prep.JMO.....what do I know.....lol
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Old 06-27-2006, 12:05 PM
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I think a lot is going to depend on what type of clearcoat you used.

If you used acrylic enamel clear it's going to be soft for a long time, even
with a hardener. That doesn't mean it can't be done but you'll have to be
carefull, especially if you try the razor blade method, it may not work
and you'll tear it instead of scrape it.

If it's urethane clear like used for basecoat then it'll be easy once it hardens.
Usually it can be done the next day, but even with urethane, if you
wait a few days it'll block flatter and easier.
One trick is to level it most of the way down then let it sit out in the sun
a day or two then block sand the rest to be perfectly flat.
That seems to work the best.
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Old 06-28-2006, 07:51 AM
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Thanks to all of you who offerred advice.
This was my first request for help and I am impressed with the response.
I sanded the whole hood with 600 and re-cleared.
Looks great.
Thanks.
Paul
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