Pressure

Discussion in 'Fiberglass/Wood/Gelcoat Repair' started by ronjon, Jun 16, 2017.

  1. ronjon

    ronjon Member

    38
    Jan 19, 2013
    Chesapeake, VA
    2001 Sundeck 240
    Lowrance Chart Plotter/Fish Finder
    5.7L Merc w/ Bravo III
    How much pressure do you apply to a rotary buffer while applying compound? I have some decent oxidation I'm trying to get rid of and polish up the boat and don't want to damage the gel coat.


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  2. bigblockcutlass

    bigblockcutlass Member

    808
    May 9, 2010
    Michigan
    1998 Carver 370 Voyager
    1990 270 sea ray sundancer twin 4.3L
    1987 Power Play 230 Conquest
    1987 Fo
    454
    Not much pressure, but I can't say I know what I am doing either. Better safe than Sorry. What I have had good luck with is Wet sanding it with 1200 to 1500 paper first then buffing with rotary and wool pad with buff Magic. I have had good luck and a finish that last longer.
     
  3. ronjon

    ronjon Member

    38
    Jan 19, 2013
    Chesapeake, VA
    2001 Sundeck 240
    Lowrance Chart Plotter/Fish Finder
    5.7L Merc w/ Bravo III
    Thanks, I'm thinking of trying a heavy compound before going to wet sanding.
     
  4. Hifirush

    Hifirush Member

    542
    Mar 21, 2014
    North Padre Island
    1998 330 DA, 7.4 MPI with V-Drives, raw water cooled, Westerbeke
    twin 7.4 MPI’s with V-Drives
    Very light pressure, let the machine do the work. If that doesn't do it, start with 2000 grit sandpaper and work your way towards heavier sandpaper (1500-1200, etc) will do the trick, then use the lighter grit to get out ultra fine scratches, then buff and polish. Use good wax or sealant of your choice to protect all the hard work. Good luck, Matt


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  5. Skuza

    Skuza Active Member

    Nov 1, 2006
    Lake St Clair, MI
    400 Sundancer
    7.4L Horizons
    Agree. The weight of the machine should do it. Anything more and your gonna burn it trying to bring it back. If that's the case light sanding first.
     
  6. BurgundyS24

    BurgundyS24 Member

    426
    Oct 5, 2014
    Napa, CA
    Sea Ray S24. full delta enclosure. Towed by 2007 Chevy 3500 duramax/allison combo.
    350 with closed fresh water cooling
    I use almost zero pressure. I'd rather go over it a few times than burn it... I had horrible oxidation and now shines like a slightly included diamond.


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  7. BurgundyS24

    BurgundyS24 Member

    426
    Oct 5, 2014
    Napa, CA
    Sea Ray S24. full delta enclosure. Towed by 2007 Chevy 3500 duramax/allison combo.
    350 with closed fresh water cooling
    [​IMG]


    [​IMG]


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  8. ronjon

    ronjon Member

    38
    Jan 19, 2013
    Chesapeake, VA
    2001 Sundeck 240
    Lowrance Chart Plotter/Fish Finder
    5.7L Merc w/ Bravo III
    Looks good. I tested a spot on the bow and she cleaned up nice using Meguiars fiberglass restoration. I only used the oxidation remover and polish with no extra pressure. I'll post some pics once I get some more done. I'm planning on removing all of the snaps so I can use the rotary buffer instead of doing the gunwale by hand. It really is a pain to go around all of the snaps.


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  9. BurgundyS24

    BurgundyS24 Member

    426
    Oct 5, 2014
    Napa, CA
    Sea Ray S24. full delta enclosure. Towed by 2007 Chevy 3500 duramax/allison combo.
    350 with closed fresh water cooling
    Depending on the amount of oxidation it may take several tries. I've probably buffed mine 3-4 times in 2 years. I use 3m compound then the finesse IT II system and follow with a hand wax each time.


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