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Old 02-09-2015, 06:31 AM   #1
Toad Haul's Avatar
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Rust in Rear Bumper

Picked up our new Class C last week. While going over it I see a bit of surface rust inside the rear bumper.

Does anyone have a good way to clean it out and repainted or seal the insides?

Darren, Donna & The Wieners
Four Winds 31L
Thor Motor Coach
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Old 02-09-2015, 10:23 AM   #2
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Turn the Rust back into solid metal.
GEMPLER'S&reg Spray-on Rust Converter | GEMPLER'S
After paint over it or spray a spray liquid rubber to coat it and keep out moisture. Spray can undercoating in a can be messy but less than by brush and will get into tight areas of the undercarriage.

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Old 02-09-2015, 07:58 PM   #3
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The stuff doggy daddy recommended works. To coat the entire length of the sq. tubing, attach a johnny-mop to an old broom handle and swab it from both ends.
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution. "Abraham Lincoln"
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Old 02-10-2015, 07:27 PM   #4
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Have used Rust Bullet from Eastwoods with success. Brush it on and don't get any on your skin because it doesn't come off.
Troy & Erica Tikalsky
1985 BlueBird Wanderlodge
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Old 02-10-2015, 07:35 PM   #5
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Originally Posted by Toad Haul View Post
Picked up our new Class C last week. While going over it I see a bit of surface rust inside the rear bumper.

Does anyone have a good way to clean it out and repainted or seal the insides?
Study/read up on this stuff Fluid FilmĀ® | Corrosion Preventative, Lubricant and Rust Inhibitor
I had my auto's sprayed with it.....can't say enough..........spray on rust like your inside bumper......stops it dead, and gone. My rear axle housing on my 2011 f-150(4800 miles) was all rusted, after sprayed.....rust gone.
2000 Newmar MADP 4060, 350ISC, Spartan MM, IFS 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006Ultra & 1989 Springer
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Old 02-11-2015, 07:48 AM   #6
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Use your warranty to have it repainted. Took mine off and the dealer painted it for nothing. If its rusting inside the outside will probably come off too.
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Old 02-11-2015, 03:06 PM   #7
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Juust take it to the dealer and request bumper to bumper clean and treat under warranty.

Tony & Lori
1989 Country Coach Savannah SE
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