Cleaning interior and exterior fiberglass

Discussion in 'Sport Boats' started by The NY Dad, Nov 12, 2017.

  1. The NY Dad

    The NY Dad New Member

    Jul 10, 2017
    2010 185 sport
    190hp 4.3l Mercruiser
    I know there are probably tons of threads on cleaning but I just don't have time to search and dig through them to find out what I want to know. I have heard of people using Sno-Bowl and other acidic cleaners on the hull. Will it damage vinyl graphics? Also what about using it on the deck and interior fiberglass, I don't want to damage the upholstery or carpet. If I remove all the upholstery and carpets is it safe to use inside the boat. Thanks
  2. NotHerDecision

    NotHerDecision Active Member PLATINUM Sponsor GOLD Sponsor

    Jun 28, 2016
    Houston, Texas
    2001 Sea Ray 460 Sundancer
    2014 Seadoo 155 LTD
    2105 Seadoo 130 SE
    2013 Mercury Dinghy
    Cummins 6CTA 8.3L
    Use the least aggressive product first. Try spray nine then move up if the need arises.
  3. SloBurn

    SloBurn Member

    May 30, 2013
    Greenwood Lake, NY
    1994 270 Sundancer. 7.4L Merc. Tow with a 2006 Dodge RAM Hemi
    340 HP Merc 454 c.i.
    I use a Magic Eraser sponge, works great on scuffs and dock mars.
    Not on scum line on hull, though. You need muriatic acid for that, but don't use if bottom is painted. Also Oxcalic acid works well and not as strong.
  4. KevinC

    KevinC Active Member

    Feb 25, 2011
    Long Island, NY
    2004 340 Sundancer
    1988 Proline Center Console - 90hp Mariner/Mercury
    1969 Boston Whaler
    Twin 8.1 V-drives
    I use the Attwood Hull cleaner from Walmart on scum lines on the hull and Starbrite Non-Skid cleaner in the cockpit and up on the bow. I use Spray-9 and Simple Green elsewhere. Just watch as some of the cleaners will strip polish/wax so you will need to reapply to seal the gelcoat. For a big hull cleaning I would also look at Colenites fiberglass cleaner.

    OllieC likes this.
  5. Alegria

    Alegria Well-Known Member

    Feb 21, 2009
    Lancaster,PA Boat: -Sue Creek, MD
    2000 410 DA
    3126 CAT
    Slimey Grimey on the scum line. Not acid and works equally as well. Spray it and walk away, come back in 15 minutes and it's gone...
  6. CliffA

    CliffA Well-Known Member GOLD Sponsor

    Dec 29, 2009
    Lake Norman, NC
    2001 Sea Ray 340DA
    Name: 'Happy Place'
    4.5kW West. Generator
    Purchased Nov. 2014
    Fresh Water Use
    Twin Merc. 6.2L (MPI)
    Raw Water Cooled
    V-Drive Transmissions
    before we start throwing out the names of different cleaners i think the first question we need to ask is what specifically are you trying to clean?.....different cleaners work better on various things.......

  7. OllieC

    OllieC Member SILVER Sponsor

    Mar 11, 2013
    2005 Weekender 215
    Mercruiser 5.0 mpi, Bravo III
    +1 on Starbrite Non-Skid Cleaner. I buy it by the gallon.....I've turned on fellow boaters to this stuff for their interiors. If I get any scuff marks that don't come out on the interior, then I get a buff pad and some cleaner wax & buff it out. I've never needed more than those two products for the interior fiberglass except maybe some wax after its cleaned.

    Exterior, I'm different because I trailer and only rent slips when on vacation. So Boat soap & wax..

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