Join Date: Jun 2010
Thanked 0 Times in 0 Posts
Rep Power: 0
Sandblasting vs. Soda blasting
I am about to haul-out and have the bottom blasted prior to applying a barrier coat and bottom paint. What should I go with... sand blast or soda blast?
I can hear the gasps! "Don't sand blast it!"... so I thought that I'd open up this debate one more time.
Soda blasting has the cache, and sandblasting has always been frowned on, but the price difference is large: sandblasting is about 1/2 the cost of soda blasting.
I have found two nearby yards in the upper Chesapeake, with good reputations, that do sand blasting on their customer's boats. I have looked at freshly blasted hulls at both yards, and come away very impressed with the quality of the blasted surfaces.
It appears that if they use the "000" grit sand, and the operator has a "light hand", the results are quite good. In both cases, the blasted surfaces had the appearance of egg shell, with the only rough spots being where there were voids from the original gel coat lay-up, or where there had previously been fairing or blister work done with a filler that was softer than the gel coat.
So if there are yards doing this, and they are still in business, and I don't see alarms about it in the forums, and I'm going to put on a barrier coat... then why shouldn't I proceed with having the hull sand blasted??