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  #1  
Old 09-21-2020, 02:54 PM
Quickstep192 Quickstep192 is offline
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Default Drop filling guidance

I’m hoping someone can provide step-by-step instruction and tips for drop filling.

I understand the principle: Drip lacquer onto the void until it’s slightly overfilled, then sand level and polish.

It’s the sanding part that I’d like guidance on. If all goes well, you sand and polish, but if you sand through it’s a whole different kettle ‘o fish. That’s the part I’m most nervous about.

I have two projects for this. One is a guitar with a couple of small dings; the other is a car with stone chips. Obviously, I’ll be using matching paint for the car, it I’m guessing (hoping) that the same principles apply.
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  #2  
Old 09-21-2020, 03:42 PM
JonWint JonWint is online now
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Maximizing scraping and minimizing sanding yields a flatter result. Use backer for sanding. Fingers can cause depressions. On a car with metallic paint, a perfect reflection will a make an imperfect paint match less obvious.

http://www.frets.com/FretsPages/Luth.../dropfill.html

https://www.stewmac.com/video-and-id...ade-trick.html
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Old 09-21-2020, 05:40 PM
redir redir is offline
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Only use Nitro if the finish is indeed nitro... Assuming that is what you mean by lacquer. Otherwise CA works amazingly well and you would do it in the same manor you mention.
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Old 09-21-2020, 07:33 PM
Quickstep192 Quickstep192 is offline
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The finish is indeed Nitro. Is there any benefit to using CA instead of nitro?
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Old 09-21-2020, 09:02 PM
mirwa mirwa is offline
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Sent you a pm, there is one for drip filling with super glue and one for drip filling nitro, nitro one is titled "How to Repair Lacquer Chips"

Steve
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Old 09-22-2020, 06:29 AM
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hubcapsc hubcapsc is offline
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The luthier I go to thinks someone maybe put tape
on my CF-100... he "drop filled" some of the marks
and made it better. Who would put tape on their guitar ? ! ! ?

I've since seen how Billy Strings taped one of the microphones
onto his guitar ... so one answer is "people who use
their guitars as tools for work" might put tape on their guitars...





-Mike
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Old 09-22-2020, 07:26 AM
redir redir is offline
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For Nitro finishes I like to use nitro drop fill.
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  #8  
Old 09-22-2020, 02:24 PM
John Arnold John Arnold is offline
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The only benefit of using CA to drop fill on lacquer is speed. Lacquer takes days to finish curing, otherwise it will shrink and leave a depression. CA is often harder than lacquer, and will tend to stick up above the lacquer after buffing.
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