F355 Removing pits and polishing glass fog lenses - Ferrari Life
 
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post #1 of 16 Old 12-13-2015, 11:48 AM Thread Starter
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Removing pits and polishing glass fog lenses

Greetings,

So, my 95 355 had some pretty sand blasted looking fog lenses. Big thanks to Elliot for a few tips such as that these are glass lens.

Here if the process I used to get them close to new:

- Hold housing in a vise using rubber to protect - light grip pressure only

- DA Sander: 150, 220, 400, 600, 800, 1000, 3000, 5000 grits. Use 150 to sand the lens down to remove the pitting. Some pits are very deep and I decided to let a few of them remain as to not remove too much glass. After the pitting is gone, progressively work your way up in grits. I used a wet paper towel to wipe the lens and cool it all throughout the process.

- Polish with a glass polish disk, DA polisher (could be same sander) using 3M glass polish.
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post #2 of 16 Old 12-13-2015, 01:14 PM
 
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Thanku Dave

Great to know
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post #3 of 16 Old 12-13-2015, 07:59 PM
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Since your on the topic of these lights. Has anyone tried a blueish style bulb. I tried a few but none were really blueish. Basically just a diff shade of white. I have seen some cars with a blue tint and i thought i would try but could not find the right ones i guess.
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post #4 of 16 Old 12-14-2015, 04:54 AM Thread Starter
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Hi Grant, I'm a bit of a purist so no blue bulbs for me. If i ever change bulbs it will be to go with whiter ones
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post #5 of 16 Old 12-14-2015, 11:32 AM
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Originally Posted by Taz355 View Post
Since your on the topic of these lights. Has anyone tried a blueish style bulb. I tried a few but none were really blueish. Basically just a diff shade of white. I have seen some cars with a blue tint and i thought i would try but could not find the right ones i guess.
You may want to try a HID bulb conversion to get some better light.
Here's a color chart
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post #6 of 16 Old 12-14-2015, 10:29 PM
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Dave just so you know i bought some 6000k as per chart. They are nice and white. Dont get me wrong did not want want blue but a bit of a tint insted. If you ever see any in your travels send me a line thanks.
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post #7 of 16 Old 12-15-2015, 09:22 AM
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Quote:
Originally Posted by dave rocks View Post
Greetings,

So, my 95 355 had some pretty sand blasted looking fog lenses. Big thanks to Elliot for a few tips such as that these are glass lens.

Here if the process I used to get them close to new:

- Hold housing in a vise using rubber to protect - light grip pressure only

- DA Sander: 150, 220, 400, 600, 800, 1000, 3000, 5000 grits. Use 150 to sand the lens down to remove the pitting. Some pits are very deep and I decided to let a few of them remain as to not remove too much glass. After the pitting is gone, progressively work your way up in grits. I used a wet paper towel to wipe the lens and cool it all throughout the process.

- Polish with a glass polish disk, DA polisher (could be same sander) using 3M glass polish.

Dave, do you suppose this process would work on windshields?
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post #8 of 16 Old 12-15-2015, 09:50 AM Thread Starter
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Dave, do you suppose this process would work on windshields?
Jerry, I really don't know given the windshield is a different makeup?

Also, it can't be see in the photos but doing this does alter the shape of the lens a bit as it's free hand work. I was pretty careful but it's impossible to follow the lens shape 100%. Given a windshield is larger, that part would probably be easier.

Certainly, the glass polish step could be done and that would probably help quite a bit even if small pits still remained.

I plan to polish my shower door when I get a chance so it cleans easier
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post #9 of 16 Old 12-15-2015, 08:26 PM
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Originally Posted by dave rocks View Post

Also, it can't be see in the photos but doing this does alter the shape of the lens a bit as it's free hand work. I was pretty careful but it's impossible to follow the lens shape 100%. Given a windshield is larger, that part would probably be easier.

Certainly, the glass polish step could be done and that would probably help quite a bit even if small pits still remained.

I plan to polish my shower door when I get a chance so it cleans easier
To polish the dome shaped item we make a vaned contour like a turbine pattern then use that with cerium oxide to polish lens shaped items.


Agreed on windshield, a little polish only dont go crazy you can warp the glass or crack it

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post #10 of 16 Old 12-16-2015, 05:22 AM Thread Starter
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To polish the dome shaped item we make a vaned contour like a turbine pattern then use that with cerium oxide to polish lens shaped items.
Hey Tim,

The 3M polish contains cerium oxide and that is why I got that one (after talking with you).

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post #11 of 16 Old 12-17-2015, 05:34 PM
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Dave if you were going to polish a pickup or suv windshield how long do you think it would take. Your best guess is good enough. Thanks
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post #12 of 16 Old 12-17-2015, 06:44 PM Thread Starter
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No idea Grant as I have no idea of the lens makeup. For these, once a small learning curve is over, 1.5 hours each.
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post #13 of 16 Old 12-18-2015, 03:33 PM
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Ok so you would never do a windshield in like 2 or 3 hours. Probably longer. I was thinking kinda like polishing or waxing a car so maybe 1 hour to do a windshield but seems unlikely. Thanks
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post #14 of 16 Old 12-18-2015, 03:55 PM Thread Starter
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Grant, the 1.5 hours is based on sanding out the deep pits with 150.

If a windshield had minor blems and you just wanted to polish (only) it would take an hour or so. The polish is the easy step.
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post #15 of 16 Old 12-19-2015, 08:04 AM
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Originally Posted by dave rocks View Post
Hey Tim,

The 3M polish contains cerium oxide and that is why I got that one (after talking with you).

I just found a gallon bucket of it in my shed last night while putting in the water heater

Anyway for cleaning glass that CLR stuff works EXCELLANT

Also if your very very careful you can etch a layer off with HF, hydrofluoric acid
But make sure you have a calcium gel in case any gets on you or you will be missing a body part.

They glass will start to smoke when it's dissolving. I have a quart of the good stuff LOL



EDIT
here it is in action


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post #16 of 16 Old 12-19-2015, 06:31 PM
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Very nice!
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