Dustless blasting hull??

Discussion in 'General Maintenance/Repair Questions' started by gtfireftr, Nov 27, 2017.

  1. gtfireftr

    gtfireftr Member

    270
    Oct 9, 2014
    Westport MA
    1997 Sea Ray Sundancer 290
    Twin 4.3 liter w/Alpha Drives
    My 20y/o 290DA has a lot of bottom paint on her..... I was inquiring about having it blasted and came across a guy that does dustless blasting.... he came over tonight to give me a price... He is going to use crushed glass as media, and said he has done many boats with no issues....He gave me a price of $1000. I need to mask the boat, and I need to clean up afterwards.... What do you guys think???
    Anyone here have any experience with this process?? Is it safe for the gelcoat??
    After it is blasted will I need to do a barrier coat, or just bottom paint again?
    Any suggestions are greatly appreciated....
     
  2. hottoddie

    hottoddie Member

    871
    Jan 11, 2012
    Boston/Cape Cod
    1986 Sea Ray 390 Express
    Garmin 4212 Chartplotter
    Garmin 24 HD Radar
    Garmin GSD 22 Sounder
    Garm
    454 Crusaders
    YES you will have to barrier coat after any type of bottom stripping using dry blasting. The most gelcoat friendly blasting method id Farrow Blasting. It uses hot water, lower pressure and volcanic ash. Comes out ready for paint, barrier coat optional. A 1997 Sea Ray most likely was made with polyester resin which is not as water resistant as vinylester resin which came into use widely around 2000. If I had my boat stripped I would definitely take advantage of the opportune ity to barrier coat.
     
  3. Bop

    Bop Member

    167
    Sep 3, 2013
    Georgian Bay/Lake Huron
    2001 410 Express
    Cat 3126
    I had mine done with regular sand blasting. From the research I did it seems its all in the person who is doing it. The wrong guy will screw up with any product. I ended up doing the barrier coat prior to anti-foul. Turned out perfect.
     
  4. cwiert

    cwiert Member SILVER Sponsor

    423
    May 7, 2008
    Westbrook, CT
    1998 400 Sedan Bridge
    CAT 3116 - 350HP
    I had mine done last fall. Mine was done with walnut shells as the media. I paid 1200-1400 (i forget exactly) but that included all the masking, tenting and clean up).

    After that was done, I barrier coated the bottom myself in the spring. I did 3 coats of barrier (some people do 4 or more). Then I painted it after. It was a lot of work, but worth it. This fall when it came out of the water, the bottom still looked like new.
     
  5. gtfireftr

    gtfireftr Member

    270
    Oct 9, 2014
    Westport MA
    1997 Sea Ray Sundancer 290
    Twin 4.3 liter w/Alpha Drives
    Did you notice any difference in performance? Was it worth having it done??
     
  6. cwiert

    cwiert Member SILVER Sponsor

    423
    May 7, 2008
    Westbrook, CT
    1998 400 Sedan Bridge
    CAT 3116 - 350HP
    It was SOOO worth having it done. I gained more speed (last year I averaged 18 knots at cruise, this year 20 knots), about 50 more RPM (I was only able to get 2750 last year pre blasting, and this year I got the full 2800 that I'm supposed to get), and the bottom still looked new this fall. It's like having a brand new bottom like it was from the factory. I wasn't expecting the performance boost, but was happy to have it!
     
  7. NorCal Boater

    NorCal Boater Well-Known Member SILVER Sponsor

    Jan 24, 2008
    Covington, LA
    Cobalt CM23
    GM SB 383" Stroker" Alpha Gen I
  8. Jeff6566

    Jeff6566 Member

    43
    Oct 12, 2016
    Central Texas
    370 Sundancer, 1995
    454 Mercruisers
    what type of bottom paint ? I understand there are different ones.
    and whether it matters I'm in fresh water..
     

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