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Old 02-15-2018, 06:07 PM   #11
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For the life of me I can't figure out what they are.

We have poured every single chemical that we use on our stuff...and nothing.

It looks to me like antifreeze got splattered...but we blow everything out. We got one step closer with sseaner's unit. There was a pink stain that crossed a light where it was yellow. So we know its not glue...it was something on the surface. We're not seeing it here (but I will inspect again). We see it only after it goes to the dealer. So maybe dealers are using something?

Where is the Mystery Machine when you need it.
I don't think the dealers are doing it, at least on our rig. We went and saw the rig right after the transport driver dropped it off and the dealer had done zero PDI work on it. It was still dirty on the outside with road grime from the trip. The eagle eye DW spotted it as soon as we walked in the coach. Wish we had looked closer at the ceiling when we visited at the factory, that would have helped narrow down when it was happening.
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Old 02-15-2018, 07:16 PM   #12
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Wild guess here...Mold? I've never seen what you are talking but could it be mold? Mold can be pink or red? Except bleach should take care of any mold.
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Old 02-15-2018, 07:35 PM   #13
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My 2015 DX3 definitely has glue stains on the ceiling. If you look at them with the light at the correct angle you can see where they were wiped but not completely removed. This is our third RV and they have all had some ceiling marks, this one is the worst.
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Old 02-15-2018, 08:03 PM   #14
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Ceiling stains?

Definitely not mold. Itís a pink color. They removed it with a 50/50 water bleach mixture at the factory. All clean now. . Brian, it may be this......

A common myth is that pink stain is mildew or mold. It is really a by-product of a bacterial microorganism. This organismís by-product, a pink/red dye, is soluble in plasticizer, which is the main ingredient in upholstery vinyl. When this by-product comes in contact with vinyl it causes the pink stain. Wind or rain can carry these microorganisms onto your marine upholstery. These organisms can live and grow in the foam cushion. This too will cause the pink stain on the vinyl.
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Old 02-15-2018, 08:20 PM   #15
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Could the issue be lighting?

Reason I bring this up is that not long ago I installed some LED strip lights under the cupboards in my house kitchen. Started seeing "stains" on my counter that wouldn't wash off with any cleaner.

Then one sunny day when the kitchen was well lit, and the LED strip lights were off, the "stains" were gone.

The light output can be controlled and as the level is increased or decreased the color of the "stains" changes.

Again, just a thought. I'm assuming that the unit in question has LED lighting.

Might try looking at the ceiling with a portable incandescent light.


Then again, a solution might be to just put pink filters on all lights then the pink stains will just blend in.
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Old 02-16-2018, 12:29 AM   #16
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Scott wins!

Sounds like mold but it's some sort of vinyl critter? I'd say Brian will be sending you some sort of Dynamax logo prize for the win?
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Old 02-16-2018, 08:00 PM   #17
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Picked our rig up today, the dealer tried the 50/50 bleach method with no results. These are definite pink stains and not light tricks. We will watch this thread to see if any new info develops.
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Old 02-16-2018, 08:07 PM   #18
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Picked our rig up today, the dealer tried the 50/50 bleach method with no results. These are definite pink stains and not light tricks. We will watch this thread to see if any new info develops.

I offer this purely in jest-----

You could hold a party in the unit and invite lots of smokers. Then vinyl will turn orange-brown and you won't even notice the pink.

Walked through a couple of used units once that were previously owned by smokers. Of course it only took less than a minute to decide I wasn't buying. The smell overshadowed the color
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Old 02-16-2018, 11:38 PM   #19
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Are they in certain locations? When i picked mine up from dealer we had random spots above where the slides come in but fortunately they all came off.
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Old 02-17-2018, 01:28 AM   #20
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Picked our rig up today, the dealer tried the 50/50 bleach method with no results. These are definite pink stains and not light tricks. We will watch this thread to see if any new info develops.


I believe Iíd be talking to dealer about either get the ceiling clean or change it. You shouldnít have to accept that on a brand new coach.
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