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Old 09-23-2009, 09:32 AM   #1
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Alpine Owners Club
Join Date: Mar 2007
Location: St. Louis, MO
Posts: 13

My 2001 38' FDDS has developed a lot of rust underneath. I spend the winters in Utah and often have to drive over some snowy roads getting there. There is no truck wash near the area (Park City). We try to spray it off as best we can, but probably don't get everything really clean, so the coach sits the remainder of the winter with road salt covering everything

I spent several days under the coach last summer wire brushing and applying a rust converter and paint, but all of the rust has returned as bad as before. I'm considering having the underside sandblasted and painted in an effort to get rid of the problem.

Obviously, there are lots of nooks and crannies and fragile areas (electrical wiring, hydraulic hoses, etc) that need to be protected from blasting. Does anyone on the forum have experience with this or have any advice pro/con about this approach? Any help welcomed.

Marty Carroll

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Old 09-23-2009, 08:06 PM   #2
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Join Date: Jul 2005
Posts: 214
Do not have the problem you are experiencing but if I was to consider having the underside cleaned and undercoated then I would be looking for a maintenance facility that used the baking soda blasting method. This media is as effective as other blasting medias but has several other advantages. Check out this web site: http://www.chesapeakesodaclean.com/?gclid=CKOL3JiQiZ0CFdVL5Qod4kR-aw for additional info on this soda blasting. One advantage not mentioned in this article is that the cleaned but exposed bare metal is protected to allow time for undercoating/painting to be done before rusting/corroding process begins again.
As the equipment is mfg'ed in WA then I would think there are facilities on West Coast that have this capability.
05 40FDQS

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Old 09-25-2009, 12:53 AM   #3
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Alpine Owners Club
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Location: Long Beach, CA
Posts: 1,563

You need undercoating. It's a big business in the Northern States and most of the Midwest. Used to be everyone took new cars to those guys (Ziebart, etc.) I now live in "the dry heat", but recall your issues with little fondness. As eMike says, you just need a latitude adjustment.
2003 Alpine 40FDTS (400HP)
Long Beach, CA
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Old 09-25-2009, 09:29 AM   #4
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I have considered undercoating after all the other work is done. Surprisingly, most of the undercoaters except for a couple of Ziebarts are no longer doing business in St. Louis (my summer home).

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rust, sandblasting

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