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Old 10-06-2012, 05:09 PM   #1
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Removal of 3-M mask

Does anyone have experience in taking the 3- M mask off the front of you motor home?
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Old 10-06-2012, 07:13 PM   #2
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Yep. Been there, done that. It's a big, finger cramping job but it can be done. I pulled mine off after it had been on about 2 1/2 years. Start at a corner and peel very slowly, pulling as close as possible to keep the loosening tab parallel to the surface. I found you lose less paint that way. I didn't have any luck with heat, but others have tried heat guns and hair driers with mixed success. You will leave some glue on the paint and I found lacquer thinner the best way to remove it. It doesn't dissolve with any solvent I tried, but lacquer thinner on clean rags works. If you have any stone hits on the Diamond Shield, the paint and/or clear coat may come off when you peel over that spot. We were able to repair a number of places where the clear coat came off, but when the underlying paint was damaged that section of the panel needed a repaint. Be particularly careful on areas with sharp a radius. We found some edge areas where the generator slide cover was were easier to pull the clear coat off. I think it was more a matter of poor paint adhesion rather than my fault, but I'm prejudiced. (LOL) Good luck with the job. I'm definitely glad I did it. I can fix paint chips, but the damage that occurred from stone hits under the Diamond Shield and the scratching that could not be polished out were beyond me.
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Old 10-07-2012, 04:20 AM   #3
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The job is labor intense and slow going,one week to complete. We waited for relatively warmer temps and used an inexpensive steamer to heat the 3M mask and slowly removed the mask with a plastic razor blade (yellow). Once all of the mask was off we used aerosol 3M adhesive remover and would scrape the glue off with the plastic razor blade. You will at this point go thru lots of those little blades as the adhesive remover tends to destroy the blades. We preferred the blades over a more aggressive scraper because the blades tended to mould to the contour of the coach and would break before you dug too deep. Once you have scraped off the adhesive, continue with the 3M remover and spray a small area and use rags, or blue paper shop towels and rub off the adhesive. Four cans of the adhesive remover and aprox. 100 blades later and you should be close. The actual amount of glue is incredible as you will see, my wife had a small stand that she utilized to scrape the glue off of her blades, over time she had a small glue monster about eight inches high. Be careful around the pin striping, try to scrape at an angle so that you don't catch the edge. Polish and wax the front. Once all this is complete, stand back to admire your work, give yourself and significant other a big hug cause your going to need it. By the way our rig is a 2004 model, so that stuff was on a long time, good luck and remember the pain is worth the gain.

Doug And Susan
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Old 10-08-2012, 07:08 AM   #4
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Thanks for the info. We have a 2008 MH so it has been on there for four plus years.
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Old 11-15-2013, 09:16 PM   #5
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We have the mask off the 2008 Simba. We found the best product to get the old glue off the paint was Rapid Remover. Sprayed it on used a plastic blade and scraped it off and then washed it down with water. Other products we tried were not water soluble.
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Old 11-16-2013, 04:11 AM   #6
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Start at the top and center with some hot lights or even a heat gun to get a pocket started. Pour in some lacquer thinner into the pocket and let it do the work for you . The entire section will pull off without all the drama.
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Old 01-09-2014, 10:57 PM   #7
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Quote:
Originally Posted by RV Wizard View Post
Start at the top and center with some hot lights or even a heat gun to get a pocket started. Pour in some lacquer thinner into the pocket and let it do the work for you . The entire section will pull off without all the drama.
What will the lacquer thinner do to clear coat or paint? Does it soften them too? If not it sounds like it's worth trying.
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Old 01-10-2014, 04:09 AM   #8
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I was giving this method by a company that installs the system. I personally have not tried it yet but I think the clear coat under the film should be hardened to the point of it not being an issue.
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