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Old 12-22-2015, 10:16 AM   #1
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3M mask removal begins

Like many of us we have 3M mask on the front of our coach that is looking pretty bad. Cracked and turning black. Body shop guy says about three days work so I am doing it myself.

Using a plastic razor blade, the Florida sun, a heat gun, 3M adhesive remover and acetone so far. Using just the sun with the razor is more work but it leaves less adhesive. The heat gun makes the mask peel off faster but with much more adhesive to clean up and it does not come off easily.

The 3M adhesive remover should be left on to work but with any wind and the sun on it, it evaporates very fast. It does work better with the plastic razor if scraped immediately. The acetone can be poured right on a rag and used to remove the adhesive. It is cheap but needs more elbow grease.

Some photos of both the side mirrors. Passenger side done, driver side not started yet.
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Old 12-22-2015, 10:18 AM   #2
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I like the passenger side better.
Good job.
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Old 12-22-2015, 10:25 AM   #3
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Quote:
Originally Posted by Clifftall View Post
I like the passenger side better.
Good job.
Thanks Cliff. The driver side is almost done now. I'm thinking of trying Goof Off remover. We used some at the stick house to remove adhesive from stair treads on hardwood steps. It took the goo off without hurting the polyurethane. Anything to speed this along. It's taking the better part of an afternoon and a six pack just to get the plastic off one mirror.

Good thing we are retired.
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Old 12-22-2015, 10:31 AM   #4
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I've used googone on a lot of adhesive removal jobs.

http://googone.com/Home.aspx
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Old 12-22-2015, 10:40 AM   #5
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Mark, save your money, your hands and lungs and don't mess with Goof Off or Goo Gone. My body shop friend recommended using simple mineral spirits to soften the glue, followed by lacquer thinner for final clean up.

Like you, I used the Myrtle Beach sun and many plastic razor blades. After pulling off a piece (sometimes large pieces, sometimes small), I swabbed on some mineral spirits, scraped off the glue (usually had to do that twice), then wiped with lacquer thinner. I did the entire front of my coach that way. It was time consuming but after a good coat of Mequiars cleaner/wax, it was pristine.
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Old 12-22-2015, 10:58 AM   #6
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We used a small garment steamer with the plastic blades followed by Auto Tech adhesive remover, available online or a body shop supplier.

Auto Tech Manufacturing
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Old 12-22-2015, 11:10 AM   #7
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I had to remove a section of 3M mask around one of the headlights that had came loose. I had no issues removing the plastic using some heat but the adhesive was very difficult to remove. I tried everything I could buy but nothing seemed to work very well. I finally got steered onto a product called Quick-N-Easy made by Auto Tech and was amazed how well it removed the adhesive using plastic razor blades. I have no connection to this product or the company but I can attest to the fact this stuff works. Safe for paint and gelcoat and the section I worked on looks like new.
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Old 12-22-2015, 02:25 PM   #8
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WD40 works great and will not hurt the paint.
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Old 12-22-2015, 07:51 PM   #9
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3M Diamond Shield are both junk. With in a few years they have to come off and these companies do nothing for the customer.
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Old 12-22-2015, 08:28 PM   #10
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The front of our motorhome was still perfect after 8 years. To us, it is a great product. Perhaps it depends on the way it's applied.
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Old 12-22-2015, 09:43 PM   #11
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To those of you who have removed the 3M mask...how does the paint look after you are all done?
Does it hurt or remove the clear coat?
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Old 12-23-2015, 05:50 AM   #12
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Quote:
Originally Posted by twogypsies View Post
The front of our motorhome was still perfect after 8 years. To us, it is a great product. Perhaps it depends on the way it's applied.
You're not quite there... Ours and most we've talked to happen at 10-11 years
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Old 12-23-2015, 08:29 AM   #13
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Thanks for all the suggestions. Funny someone told me to try WD40 just the other day. I will try any and all of those ideas since none are terribly expensive and easy to get. The steamer might be a little more but if it works, I'm good with that.

The second mirror is done and came out great. I tried the Goof Off and it didn't work much better than acetone or the 3M remover. I did seem to dull the clear coat more but a couple coats of wax fixed that.

The driver side mirror was by far the worst cracked and black of the entire front so I'm hoping the rest may be easier. I will post some photos and updates on the progress as it goes. Taking a break until after the holiday so thanks again and Merry Christmas.
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Old 12-26-2015, 08:30 AM   #14
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If mine holds up for ten years, I will be very happy. I would hate to see what the paint would look like without it after ten years. The only thing I don't like about it is that some bug stains seem to have permanently fogged or clouded some areas were I might not have cleaned them off quickly. Does anyone have a way to remove these stains from the diamond shield?
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