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Old 08-09-2013, 10:12 AM   #1
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jwnall's Avatar
City: St. Marks, Florida
Country: US
Vessel Name: Morgan
Vessel Model: Gulfstar 36
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Best fiberglass cleaner

Having all this information available at the click of a mouse on the internet is a wonderful thing, but sometimes there is just too much information. Especially when a heck of a lot of it is just advertising, which may or may not be factual. I have googled "best cleaner for dirty fiberglass" and gotten more information than I ever really wanted to know!

So rather than try to figure out from all that puffery which is the best cleaner to use on cleaning the dirty fiberglass outside of my boat (both hull and topside), I will instead humbly ask for advice from the experts on here. (And I am not being sarcastic when I use the term "expert," either, since some of you clearly are!)


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Old 08-09-2013, 11:32 AM   #2
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City: Hailing Port: Charleston, SC
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Vessel Model: Sabre 42 Hardtop Express
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Well, everyone will have an opinion and favorite products. Here is mine.
  • For rust and stubborn stains---hull stain remover, On and Off, Roll Off.FSR
  • For barnacles---On and Off, Zing
  • For regular cleaning of non skid areas---Deck cleaner (Starbrite or other brands. Even the Wal-Mart brand does a good job)
  • I like the 3M
  • I like the 3 M brands for cleaning and waxing. They have various grades of cleaners and compounds for buffing. Then wax or polish.
  • I use a regular car wash with some wax in it for washing.

Don on Moonstruck
Sabre 42 Hardtop Express & Blackfin 25 CC
When cruising life is simpler, but on a grander scale (author unknown)
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Old 08-09-2013, 12:55 PM   #3
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Originally Posted by jwnall View Post
...........which is the best cleaner to use on cleaning the dirty fiberglass outside of my boat?
IMHO Marykate On and Off hull cleaner works like magic - just apply with rag or brush, wash it off and Voila!

A word of caution: it smells like the main ingredient is muriatic acid, so don't get this stuff on your clothes or sunbrella covers etc.
If all else fails, read the instructions
If it ain't broke, don't fix it
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Old 08-09-2013, 04:56 PM   #4
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I use Roll Off on a regular basis. It works great and does not hurt Canvas or isenglass. You hose down the deck then spray on a little bit and leave it on for a few minutes. Then with a boat brush scrub lightly and hose off. One guy on our dock tried it and now every one uses it.
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Old 08-09-2013, 05:00 PM   #5
City: somewhere
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Can any of these be used with painted surfaces?
Life is a Beach
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