Page 1 of 4 1234 LastLast
Results 1 to 10 of 37

Thread: Removing yellowing from RV

          
  1. #1
    Registered Member
    Join Date
    May 2009
    Location
    Eagle Idaho
    Posts
    20
    Rep Power
    6

    Removing yellowing from RV

    I just received my Fiberglass Restoration System kit, and started playing with the No 49 Oxidation Remover on several out of the way places. (The roof is fiberglass, so I can try all kind of things and you can't really see them unless you're on the roof).

    I've tried by hand and with my PC; one coat, two coats, three coats; more product / less product; letting it get almost dry / removing excess when it's still wet...etc. In all cases it looks a lot better, but not quite what I was hoping for - it still looks yellow.

    On the roof there's an area where the antenna blocks the sun when it's down. This area is still very white. The surrounding areas are yellow from the effects of the sun. I did my tests in areas adjacent to the white area - at best I've got about half of the yellow out.

    Do I need to go to a more aggressive product? Or do I just need some improved technique?

  2. #2
    Registered Member
    Join Date
    Jun 2008
    Location
    San Diego
    Posts
    35
    Rep Power
    7

    Re: Removing yellowing from RV

    Looks like both of our situations are similar. If you wouldn't mind, could you tell us a little more about the type of fiberglass you have and the age? Is it a gelcoat? Do you have any oxidation or is it just yellowed?

  3. #3
    Registered Member Mike Phillips's Avatar
    Join Date
    Jan 2004
    Location
    Stuart, Florida
    Age
    53
    Posts
    24,976
    Rep Power
    515

    Re: Removing yellowing from RV

    Quote Originally Posted by LongGone View Post

    one coat, two coats, three coats;
    Just to double check because when you type coats, it reads like you're applying this like a finishing wax, that is spread it out over the surface and let it dry.

    Used correctly, it should look kind of like this when you're applying it...





    That is you apply about a tablespoon to your applicator pad and then work a section about a foot squared applying firm pressure with a fast hand movement.

    Part of the cleaning or abrading power comes from the abrasives in the products. The other major part of the cleaning or abrading power comes from you and the perspiration and passion you put behind your applicator pad.


    As for working with a DA Polisher, you would want to be on the 5.0 speed setting and in most cases you can use a foam cutting pad when working on oxidized gel-coat.



    Quote Originally Posted by LongGone View Post
    letting it get almost dry / removing excess when it's still wet...
    The only Meguiar's paint care products that need to dry are our waxes, see this thread,

    Which products need to dry before removing?


    Mike Phillips
    Office: 800-869-3011 x206
    Mike.Phillips@Autogeek.net
    "Find something you like and use it often"

  4. #4
    Registered Member Murr1525's Avatar
    Join Date
    Oct 2004
    Location
    Pittsburgh, PA
    Age
    34
    Posts
    18,687
    Rep Power
    226

    Re: Removing yellowing from RV

    I think he means coats of cleaner.

    As in, 3 coats (applications) of cleaner isnt removing the yellowing.
    '08 Subaru Legacy 2.5i SE - Newport Blue Pearl

  5. #5
    Registered Member Mike Phillips's Avatar
    Join Date
    Jan 2004
    Location
    Stuart, Florida
    Age
    53
    Posts
    24,976
    Rep Power
    515

    Re: Removing yellowing from RV

    Gel-coats tend to be fairly porous, especially older technology. This enables liquids/rain/moisture/dirt to penetrate into them over time but this staining effect is topical.

    Oxidation is also topical, so the way to remove the staining, yellowing and/or oxidation is to abrade the surface until you get past the problem and expose a new layer or base.

    How much material you can remove, or how aggressive of a product you can use depends upon how thick the gel-coat is and that's kind of hard to measure. Usually gel-coat coatings and components are a lot thick than most automotive paints so removing too much material is usually not a problem but use common sense at the same time.


    Check this thread out...

    How much cut? #49 vs #67 vs #91





    M49 Oxidation Remover is the least aggressive of these 3...

    M67 One Step Compound is next in line and was designed more for hand application but can be used by machine for 2000 grit or finer

    M91 Power Cut Compound is the most aggressive...It was designed to remove up to 1000 - 1200 grit on gel coat by rotary machine but can also be used by hand.



    Mike Phillips
    Office: 800-869-3011 x206
    Mike.Phillips@Autogeek.net
    "Find something you like and use it often"

  6. #6
    Registered Member Mike Phillips's Avatar
    Join Date
    Jan 2004
    Location
    Stuart, Florida
    Age
    53
    Posts
    24,976
    Rep Power
    515

    Re: Removing yellowing from RV

    Quote Originally Posted by Murr1525 View Post
    I think he means coats of cleaner.

    As in, 3 coats (applications) of cleaner isnt removing the yellowing.
    I'm just wanting to know how he's applying it?

    Some people apply an aggressive cleaner gently or like a finishing wax because they think the chemical is going to do all the work.

    I've met plenty of people that have applied ScratchX like this and then been let down that they didn't remove any scratches. Sometimes the missing element is the passion behind the pad.


    Mike Phillips
    Office: 800-869-3011 x206
    Mike.Phillips@Autogeek.net
    "Find something you like and use it often"

  7. #7
    Registered Member Poki's Avatar
    Join Date
    Jul 2008
    Location
    U.S.A.
    Posts
    553
    Rep Power
    16

    Re: Removing yellowing from RV

    I agree with beeser....more info. would be helpful. What is your RV brand/model/year? I have some experience with RVs having lived fulltime in one for 13 years now. Are your sidewalls yellowing too? Front and rear caps yellowing? Typically roofs and endcaps will oxidize MUCH worse than sidewalls. They are made by a different process. Roofs are seldom clearcoated. Depending on the age/model, the endcaps may not be clearcoated either. Give us a bit more info. and we'll see what we can come up with.....
    Barry

  8. #8
    Registered Member
    Join Date
    May 2009
    Location
    Eagle Idaho
    Posts
    20
    Rep Power
    6

    Re: Removing yellowing from RV

    I've got a 2003 Winnebago Adventurer. For the first 4 years of its life it was stored outdoors in the harsh sun of New Mexico, and while it was cleaned 2-3 times per year I used a basic wash/wax product made by a company specializing in RV products.

    For the past 3 years it gets stored in the garage we built for it when not in use. But it's in use 4-6 months per year.

    It started looking pretty bad last year, and I bought a PC DA polisher, and went over the entire "Bus" with a light oxidation remover, and then waxed. It looked quite a bit better, but not yet where I wanted it to be. Since then we've taken several trips, including spending the winter in Phoenix, where the drivers side got blasted by the sun every day.

    So now I want to go after it again, but with a product that's more aggressive than what I previously used, which is why I went to the No 49 Oxidation Remover.

    This thing's a pain to do - it's big, and there are a lot of decals/graphics that I need to work around and between. I don't want to go through the whole process only to find that I needed to use a different, more aggressive product.

  9. #9
    Registered Member
    Join Date
    May 2009
    Location
    Eagle Idaho
    Posts
    20
    Rep Power
    6

    Re: Removing yellowing from RV

    The end caps, the drivers door, and the trim pieces around the slide-outs are all nice and white. According to Winnebago, they are painted white, and are therefore less likely to fade.
    The rest of the sidewalls are all gelcoated, and have yellowed considerably, and the difference between the white painted areas and the yellowed areas is what I'm trying to fix. (hopefully it hasn't gone too far)

    I was doing most of my test work on the roof, in case I made any mistakes. It's fiberglass, but has never had as nice a finish as the sidewalls.

  10. #10
    Registered Member
    Join Date
    May 2009
    Location
    Eagle Idaho
    Posts
    20
    Rep Power
    6

    Re: Removing yellowing from RV

    As for technique, Mike...

    I started by hand, since there are so many small areas between decals where I'll have to clean by hand. I'd work a 6" x 6" area, go over it a first time, using a circular motion with as much pressure as my 2 fingers could handle. After removing the excess, I'd repeat 1 or 2 more times on the same area.

    It appears that my problem was in not using enough product - for that 6x6 area I was using a glop the size of a dime, and the product would dry up before I felt like I was finished working it. And at that point it would be difficult to remove with the microfiber cloth.

    So I'm guessing that I was ok on the "passion" side of the equation, but short on the "product" side.

    I'll try another area today, but with more product.

Page 1 of 4 1234 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Tips for removing swirls by hand with SMA Technology
    By Tuck91 in forum Working by Hand
    Replies: 46
    Last Post: Feb 4th, 2013, 07:50 AM
  2. Removing Random Isolated Deeper Scratches - Man vs Machine
    By Mike Phillips in forum Hot Topics
    Replies: 6
    Last Post: May 17th, 2009, 10:13 PM
  3. removing wax from previous detailing
    By yga in forum Detailing 101
    Replies: 21
    Last Post: Apr 5th, 2009, 05:49 PM
  4. Car detailing and removing defects
    By Blackford in forum Detailing for dollars
    Replies: 6
    Last Post: Oct 21st, 2008, 03:12 AM
  5. Removing Wax
    By jhay in forum Detailing 101
    Replies: 5
    Last Post: Mar 23rd, 2006, 09:06 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •