Dustless blasting hull??

[gtfireftr]

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....

 

[hottoddie]

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.

 

[Bop]

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.

 

[cwiert]

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.

 

[gtfireftr]

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.

Did you notice any difference in performance? Was it worth having it done??

 

[cwiert]

Did you notice any difference in performance? Was it worth having it done??

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!

 

[NorCal Boater]

Anybody tried or seen Dry Ice Blasting? https://en.wikipedia.org/wiki/Dry-ice_blasting

 

[Jeff6566]

what type of bottom paint ? I understand there are different ones.
and whether it matters I'm in fresh water..