Sand Washing-What is it? - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 10-22-2005
foxglove's Avatar
Senior Member
 
Join Date: Dec 2002
Location: Columbus OH
Posts: 180
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
foxglove is on a distinguished road
Sand Washing-What is it?

What is sand washing?

I read on yachtsurvey.com that sand blasting is not recommended. They Quote; "Under no circumstances should you ever sand blast or sand sweep a bottom. Sandblasting shatters the plastic and exposes the fibers far more than they already are. In addition, it craters the gel coat with millions of craters that only worsens the problem when it is sand swept."

My yard suggested ''sand washing'' to remove the paint (and maybe my 15 year old barrier coat too????) Has anyone tried it?

I have some minor blistering(I have read Jeff H posts on the subject)and I am seeking the best approach. But what is sand washing?

Thanks,

Max
Reply With Quote Share with Facebook
  #2  
Old 10-22-2005
Senior Member
 
Join Date: Mar 2004
Posts: 122
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
PaulBl is on a distinguished road
Sand Washing-What is it?

My guess is they are refering to low pressure sand blasting. The better alternative would be soda blasting. Baking soda is used instead of fine sand. It can in the hands of an expert remove paint a layer at a time (or almost that precise). It''s not as "sharp" as sand.

You really don''t want to open up the deeper layers at all if possible. You''ll need to repair with epoxy those areas that need it.

You''ll want no more than 12% moisture before you barrier coat or you can''t get a warranty (you want one of those as much as anything).

That alone can take a long time unless they use vacuume techniques to remove the moisture. It''s a pretty neat process with plates that can drop the vapor pressure pretty darn low and basically boil the moisture out at a room temperature. Boiling point drops with a decrease in pressure. Low enough and ice evaporates. Water is a strange substance.
Reply With Quote Share with Facebook
  #3  
Old 10-26-2005
foxglove's Avatar
Senior Member
 
Join Date: Dec 2002
Location: Columbus OH
Posts: 180
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
foxglove is on a distinguished road
Sand Washing-What is it?

Thank you very much for the information. I have 15 years of bottom paint and now is a good time to remove it. I hope the moisture level drops to acceptable levels by next summer.

Thanks again

Max
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



All times are GMT -4. The time now is 09:02 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.