Sandblasting - SailNet Community
 
LinkBack Thread Tools
post #1 of 4 Old 01-17-2010 Thread Starter
Member
 
Greenflash35's Avatar
 
Join Date: Nov 2008
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
 
Question Sandblasting

We're going to replace all of the interior hull paint " bilges, cabinets, etc" with Gel Coat. That's a lot of sanding, has anybody ever used a Sandblaster on the inside? Will 80 psi hurt the fiberglass hull?
Greenflash35 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 4 Old 01-17-2010
Senior Member
 
bljones's Avatar
 
Join Date: Oct 2008
Location: South Coast Ontario
Posts: 8,469
Thanks: 35
Thanked 90 Times in 80 Posts
Rep Power: 8
   
wlanut shells would be a better choice than silica blasting, but I would hesitate to blast below deck. It gets everywhere, and you will be cleaning up dust for months to come. If you don't like sanding, you're going to have to strip it with a chemical stripper, and even then you will still have some sanding to do. In any event, are you sure you want to re- gelcoat? Paint would be a better choice, and will require less sanding.
bljones is offline  
Quote Quick Reply Share with Facebook
post #3 of 4 Old 01-17-2010 Thread Starter
Member
 
Greenflash35's Avatar
 
Join Date: Nov 2008
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
 
Thanx bljones, we're not to worried about the mess because the sanding of the fiberglass is making a dust layer even with a vacuum sander. The reasons we would like Gel Coat instead of Paint is that on our boat there is heavy fiberglass cloth not mat and even with many coats of Paint it's vary porous and "difficult to clean". We would like a smooth surface. Also this sounds bad but part of the reason we're doing this is after we sail in Really Really bad storms the Bulk Head to Hull glass connection has cracked. So I'm going to beef it all up now but when we're out cruising id rather just slap a bandage over the Gel Coat.
Greenflash35 is offline  
Quote Quick Reply Share with Facebook
post #4 of 4 Old 01-17-2010
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
You really don't want to use sandblasting on a GRP boat. It is too easy to damage the laminate with sand, since it is a very aggressive media. Instead of walnut shell media, I would recommend sodablasting the interior. Unlike walnut shells, the soda used in sodablasting cleans up with damp rags or towels quite well.

If you want a really smooth interior surface, you'll probably want to use a thin layer of thickened epoxy to both seal and smooth the interior surface. Gelcoat will stick to a properly prepped epoxy surface well enough for your cosmetic use. Also, the use of thickened epoxy on the interior of the boat will help seal the laminate and prevent water from migrating from a wet bilge into the laminate.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Sandblasting alternative? lee_1999 Gear & Maintenance 6 05-03-2002 05:48 AM
Sandblasting NateWing Gear & Maintenance 1 02-18-2002 01:31 PM
Sinful Sandblasting Dan Dickison Gear and Maintenance Articles 0 07-31-2001 08:00 PM
Sandblasting? michaelhalliday General Discussion (sailing related) 5 03-23-2001 04:29 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome