Taking On Blasting Portion Of Tug Bottom Paint Renewal - Sandblasting - Contractor Talk

Taking On Blasting Portion Of Tug Bottom Paint Renewal

 
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Old 06-05-2019, 09:08 AM   #1
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Taking On Blasting Portion Of Tug Bottom Paint Renewal


Marine Services contractor here...with a couple questions. Hoping to get some kind advice from a few of you experienced folks.

Not going to pretend to know what I'm doing in regard to blasting, but have been reading enough to give me the confidence to take on the blasting portion of a small project we're doing. Like most small companies, we're always looking for ways to shave expense while holding a high maintenance standard. Hard work and labor we can do.

We have a 75'x 35' steel hulled tug that we're putting a new coat of bottom paint on. Roughly 3000 sq/ft of worn paint (not much rust scale) to remove. The boat is only 5 years old, this is the first bottom paint renewal. The coatings company we're hiring has agreed to rent us thier DB800. We plan on using nickel slag Green Diamond 3060 as media.

My two questions for now are:

How much media should I purchase to do the job thoroughly & well? I'm working in an area that I won't be able to source the media for several days if I run out, so I will calculate a percentage of extra to purchase.
We own a Sullair 185 compressor, should I use it or not bother & rent the 375? I keep seeing air is the ticket to efficiency.

Thanks in advance!
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Old 06-10-2019, 11:34 PM   #2
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Re: Taking On Blasting Portion Of Tug Bottom Paint Renewal


What size nozzle? What pressure? A #6 nozzle needs 175 cfm. You will likely use a minimum of 150lbs per hour. Don't know how to help with how fast the finish will come off not knowing what it is or how clean it has to be. I would figure at about 30sqft per hour?

Hope this helps.

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Old Yesterday, 11:27 AM   #3
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Re: Taking On Blasting Portion Of Tug Bottom Paint Renewal


Quote:
Originally Posted by nonobadog View Post
What size nozzle? What pressure? A #6 nozzle needs 175 cfm. You will likely use a minimum of 150lbs per hour. Don't know how to help with how fast the finish will come off not knowing what it is or how clean it has to be. I would figure at about 30sqft per hour?

Hope this helps.
Thanks for sharing nonobadog, any information helps at this point. Not that I doubt you, because I really don't know what I'm doing...but I sure hope you are wrong! I just loaded 8000lbs of media to a truck. I estimated 120 sf/hour, 4X faster than you. I also estimated 250lbs an hour. I understand there are all sorts of variables that dictate the answers to my questions. This will be a learning experience for sure.
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