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Clear Coat Problems
ChurchSTSV
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Arizona, United States
Joined: September 20, 2017
KitMaker: 300 posts
Armorama: 14 posts
Posted: Friday, March 29, 2019 - 03:26 AM UTC
So I have a question for my first auto project in 20+ years.

I had some great success with some Krylon clear on the body of the vette I am working on. Here is the problem:



You can see the clear pooled at the bottom of the hood and it is noticeable to the touch. I was wondering if this could be wet sanded down with these:



I have never wet sanded before but thank goodness for YouTube.

Is it normal for something like this to appear the way it did? It almost makes the hood a darker shade of red than the rest of the body.

Thanks for the help!
retiredyank
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Arkansas, United States
Joined: June 29, 2009
KitMaker: 11,610 posts
Armorama: 7,843 posts
Posted: Friday, March 29, 2019 - 07:22 AM UTC
I can't advise on whether or not you can use those blocks, but the pooling is evident of too heavy a coat being applied.
sgtreef
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Oklahoma, United States
Joined: March 01, 2002
KitMaker: 6,014 posts
Armorama: 4,339 posts
Posted: Wednesday, April 03, 2019 - 11:49 AM UTC
They make polishing pads that you could use but those grits would be a starting point say 12,000 grit.

https://www.pennstateind.com/store/PKFINKIT.html

Cheaper then for models.
U-mark
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Michigan, United States
Joined: January 04, 2017
KitMaker: 109 posts
Armorama: 77 posts
Posted: Wednesday, April 03, 2019 - 11:00 PM UTC
The MicroMark polishing kit starts at 2400 grit and progresses to 12000. The sandpaper is cloth backed not foam, but they do included a foam block to wrap it around when needed. I've used it on several Tamiya 1/12 scale kits with beautiful mirror like results.
Kevlar06
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Washington, United States
Joined: March 15, 2009
KitMaker: 2,641 posts
Armorama: 1,431 posts
Posted: Thursday, April 04, 2019 - 03:01 AM UTC
Charlie, yes you can sand it back, and the Micro Mark sanding/polishing system mentioned above will work great. You can also lightly use oooo steel wool, just make sure you clean it up by rinsing the part under cold water after you're done. Now, as for the reason for this problem-- you used to heavy a coat as mentioned above also-- a frequent problem when using spray-can paints, especially hardware store varieties like Krylon. These paints are made for large area coverage, and are difficult to control, But there is a simple solution-- which I highly recommend, simply decant the paint into another container and use it in your airbrush. This will give you more control of the paint, and produce a finer spray pattern.
VR Russ
ChurchSTSV
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Arizona, United States
Joined: September 20, 2017
KitMaker: 300 posts
Armorama: 14 posts
Posted: Thursday, April 04, 2019 - 03:17 AM UTC

Quoted Text

Charlie, yes you can sand it back, and the Micro Mark sanding/polishing system mentioned above will work great. You can also lightly use oooo steel wool, just make sure you clean it up by rinsing the part under cold water after you're done. Now, as for the reason for this problem-- you used to heavy a coat as mentioned above also-- a frequent problem when using spray-can paints, especially hardware store varieties like Krylon. These paints are made for large area coverage, and are difficult to control, But there is a simple solution-- which I highly recommend, simply decant the paint into another container and use it in your airbrush. This will give you more control of the paint, and produce a finer spray pattern.
VR Russ



I figured the problem with clearing the hood was it was being held vertically so the clear pooled at the bottom. Once I sand it down, I am going to re-clear with it being held horizontally.

I have tom sandpaper all the way up to 3000 I can use backed by some cloth so I don't high point anything. Gonna give it a try this weekend.

Thanks for all the tips, guys!!