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  1. #1
    Join Date
    Feb 2008
    Location
    Staffordshire
    Posts
    35

    Default Best gelcoat cleaner?

    Relative newbie question having just bought this boat last autumn. I want to give the outside of the boat a clean to get rid of stains which have appeared over the winter. On initial inspection these will not come off with a wipe and require some elbow grease or a product which dissolves them.

    Do I need to purchase something bespoke for gelcoats or is, for example, ordinary car wash/ wax liquid sufficient?

    The boat is in the water.

    Thanks in advance.

  2. #2
    Join Date
    Dec 2005
    Location
    Live London
    Posts
    3,553

    Default Re: Best gelcoat cleaner?

    If the black streaks caravan black streak remover is cheap and impressive ( ie instant)

  3. #3
    Join Date
    Apr 2008
    Location
    Isle of Man
    Posts
    1,917

    Default Re: Best gelcoat cleaner?

    Neat traffic film remover is cheap and works wonders. It will however remove any polish and wax.

    I’ve been using meguairs flagship wax. Really really impressed with it.

  4. #4
    Join Date
    Jan 2009
    Location
    Stratford on Avon
    Posts
    11,074

    Default Re: Best gelcoat cleaner?

    Actually, most boats need a polish and waxing after wintering. Mine does! You won’t bring up a decent shine just by gating rid of the streaks, it needs a bit more work.

  5. #5
    Join Date
    Mar 2002
    Location
    London
    Posts
    8,096

    Default Re: Best gelcoat cleaner?

    Quote Originally Posted by jrudge View Post
    If the black streaks caravan black streak remover is cheap and impressive ( ie instant)
    Odd..I have always found it useless!!
    OP..I d try any old chandlery gelcoat wax and restorer.IF IF you just mean a quick clean up job...more permanent, you need to restore the gelcoat finish,polish and wax.
    Choose your own snake oil preference! Mine is 3M , but no shortage of options.

  6. #6
    Join Date
    Nov 2003
    Location
    South Coast
    Posts
    472

    Default Re: Best gelcoat cleaner?

    Cillit bang. Purple & orange bottle. Magic!

  7. #7
    Join Date
    Aug 2009
    Location
    Guildford, Surrey
    Posts
    1,379

    Default Re: Best gelcoat cleaner?

    Quote Originally Posted by philipm View Post
    Relative newbie question having just bought this boat last autumn. I want to give the outside of the boat a clean to get rid of stains which have appeared over the winter. On initial inspection these will not come off with a wipe and require some elbow grease or a product which dissolves them.

    Do I need to purchase something bespoke for gelcoats or is, for example, ordinary car wash/ wax liquid sufficient?

    The boat is in the water.

    Thanks in advance.
    There are a couple of things to think about when choosing a product to wash down with.
    The condition of the surfaces and the general fallout type.


    The condition of the surfaces:
    This really is about how the surfaces are rejecting or accepting.
    Are the surfaces smooth and well protected, or are they rough and raw?
    At each end of the scale between the two, is also the probable scale between using something very mild, to using something a little more persuasive.
    Of course, the safer and more gentle option is the goal, as many cleaners by their very method and make-up are detrimental to the gel coat over long term and occasionally short term use.


    The general fallout type:
    So the boat will catch fallout for the area, it could be salty, water scale, tannin, oily, or heaven forbid even rusty!
    A de-scaler won't touch something greasy, and a de-greaser won't touch something with scale, so you first determine what fallout or 'contamination' you have. Black streaks etc are usually diesel, or perhaps aviation fuel.
    If your surfaces are tip-top, then a mild PH cleaner may well sort these out easily, the problems start when a surface is holding, then the importance of knowing which type to use becomes more significant.

    The other consideration is the type of tool you use for working the product, a sponge in its many options of density allows a choice between mild and harsh. For example having a normal yellow sponge with a ton of air in it and a much more dense, tighter sponge such as melamine; two very different sponges that will make a mild wash solution more or less effective due to how close the sponge is getting to the surface.

    As part of a kit, I'd suggest you have one very mild PH neutral, some de-scaler (such as Viakal) and a de-greaser such as Auto Glyms engine and machine de-greaser, along with a couple of sponges as above.

    As you achieve a condition closer to 100% and the surfaces are in a rejecting status, the less you will need anything other than mild PH neutral and a soft gentle sponge.

    There's no cover all answer, what works on one, may not work on another due to the above.

    Tony

  8. #8
    Join Date
    Feb 2005
    Location
    Carribbean currently Grenada
    Posts
    6,787

    Default Re: Best gelcoat cleaner?

    Orange brown rust streaks need oxalic acid.

    Green or black algae on deck or Sombrela fabric need Patio

    Try Barkeepers Friend on persistent stains.
    Monkey patching programmer [retired ]

  9. #9
    Join Date
    Sep 2017
    Location
    Taipei, Taiwan
    Posts
    262

    Default Re: Best gelcoat cleaner?

    Quote Originally Posted by Marine Reflections View Post
    There are a couple of things to think about when choosing a product to wash down with.
    The condition of the surfaces and the general fallout type.


    The condition of the surfaces:
    This really is about how the surfaces are rejecting or accepting.
    Are the surfaces smooth and well protected, or are they rough and raw?
    At each end of the scale between the two, is also the probable scale between using something very mild, to using something a little more persuasive.
    Of course, the safer and more gentle option is the goal, as many cleaners by their very method and make-up are detrimental to the gel coat over long term and occasionally short term use.


    The general fallout type:
    So the boat will catch fallout for the area, it could be salty, water scale, tannin, oily, or heaven forbid even rusty!
    A de-scaler won't touch something greasy, and a de-greaser won't touch something with scale, so you first determine what fallout or 'contamination' you have. Black streaks etc are usually diesel, or perhaps aviation fuel.
    If your surfaces are tip-top, then a mild PH cleaner may well sort these out easily, the problems start when a surface is holding, then the importance of knowing which type to use becomes more significant.

    The other consideration is the type of tool you use for working the product, a sponge in its many options of density allows a choice between mild and harsh. For example having a normal yellow sponge with a ton of air in it and a much more dense, tighter sponge such as melamine; two very different sponges that will make a mild wash solution more or less effective due to how close the sponge is getting to the surface.

    As part of a kit, I'd suggest you have one very mild PH neutral, some de-scaler (such as Viakal) and a de-greaser such as Auto Glyms engine and machine de-greaser, along with a couple of sponges as above.

    As you achieve a condition closer to 100% and the surfaces are in a rejecting status, the less you will need anything other than mild PH neutral and a soft gentle sponge.

    There's no cover all answer, what works on one, may not work on another due to the above.

    Tony
    Hi Marine Reflector,

    What type of product(s) should I use if my marina is close to a power plant which burns coal?

    I would like to:
    1. Clean the black streak.
    2. Prevent or reduce the black stuffs from the power plant.

    Thank you very much.

  10. #10
    Join Date
    Jun 2012
    Posts
    61

    Default Re: Best gelcoat cleaner?

    Hi I use starbrite none skid deak cleaner with PTEF on the topsides I get whole bottle sump into pump up garden sprayer mix 50:50 with water spray on agitate it. And pressure wash off the PTEF helps keep it clean , Iím a tight wad but I donít mind using this as it cleans ingrained dirt and keeps clean afterwards , Iíve tried everything and this works best also I use starbrite black streak remover on pvc seats and they come up a treat
    Thanks Nick

    https://www.gaelforcemarine.co.uk/Mo...=UnitedKingdom

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