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  #1  
Old 03-12-2009, 06:42 PM
638RS's Avatar
638RS 638RS is offline
 
Join Date: Aug 2007
Location: Portland, OR
Posts: 270
Default right temp for removing plexi scratches

I have scratched my canopy and bought a Scratch off kit, however I'm wondering if I would be better off doing this job after it warms up... Temps are now in the 35 to 50 degree range.

I know you are better served cutting the canopy when it is warm but does the temp of the plexi make a difference in doing repairs?
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  #2  
Old 03-12-2009, 07:00 PM
roee roee is offline
 
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Location: San Diego, CA, U.S.A.
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Default

Since you won't be cutting or drilling or otherwise stressing the canopy, there's probably not much worry of cracking the canopy at any temp. If you're still worried about it though, then obviously warmer is better.

But a different question-- there may be an optimal temperature range for the scratch removal process that achieves the best results. Best to call and ask the manufacturer or the scratch removal kit.
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  #3  
Old 03-12-2009, 11:35 PM
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sprucemoose sprucemoose is offline
 
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As luck would have it, I was just at an airport committee meeting with the manufacturer of the Scratch Off kit. I will forward this to him and see what he says.
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  #4  
Old 03-13-2009, 08:38 AM
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638RS 638RS is offline
 
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Default Thanks....

I would be interested in what he has to say..
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  #5  
Old 03-14-2009, 01:33 PM
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sprucemoose sprucemoose is offline
 
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Here's the answer, straight from the horses mouth.

Quote:

Hi Jeff!

Thanks for the link...

Although we have exhaustively tested Scratch-Off compounds at low and high
temperatures, (40-50 and above 85), and have had success, we recommend
working temperatures above 65 and less than 80. (Please note all temps are
Fahrenheit). The compounds are a culmination of years of research and are
compromised of fairly complex chemical chains - these chains require
certain temps to work in harmony. The aggregates in them are of a
diminishing return- that is they start out aggressive, needed for defect
removal, and as they are worked they break down into microscopic
"marbles" if you will. These microspheric marbles create a "No Cut" action
helping to finish off the surface leaving little or no swirls - depending
on the experience of the user. To date - this technology is the purest
form of polishing acrylic and polycarbonate surfaces. This process has
maximized performance between 65 and 80 degrees Fahrenheit.

I hope this helps.

Scott

Unquote.
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  #6  
Old 03-14-2009, 02:43 PM
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638RS 638RS is offline
 
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Default Thanks for the response

Now I have a excuse not to stand in a cold hangar... No heat available, I'll wait until it warms up a bit to tackle this project

Much appreciated....
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  #7  
Old 01-13-2021, 02:13 PM
ChrisHodgens ChrisHodgens is offline
 
Join Date: Aug 2020
Location: Roanoke, Texas
Posts: 41
Thumbs up Revival of old thread

Can anyone recommend a scratch removal system for the canopy? We have very fine scratches in multiple areas. Thanks team
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  #8  
Old 01-13-2021, 02:22 PM
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Carl Froehlich Carl Froehlich is offline
 
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Location: Dogwood Airpark (VA42)
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Iíve had good luck with the Novus product line:
#1, everyday cleaning.
#2, haze (also works great if you get a little paint overspray on the glass).
#3, for deep scratches (then followed by #2).

https://www.aircraftspruce.com/search/search.php

The one really deep scratch I put on the glass I first wet sanded with 1000 then 1500 grit paper. Then #3 followed by #2.

Carl
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  #9  
Old 01-13-2021, 02:53 PM
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Raymo Raymo is offline
 
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Location: Richmond Hill, GA (KLHW)
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+1 for Carl's recommendation. I purchased all 3 Novus polishers, based on another thread (and Carl's recommendation). Worked great on the wing tip and in-wing landing light plexi.
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  #10  
Old 01-13-2021, 03:27 PM
ChrisHodgens ChrisHodgens is offline
 
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Location: Roanoke, Texas
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Thanks guys Iíll give it a try
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