[MassHistPres] dry ice blasting for paint removal

[heartwood restoration]

i can't speak to the ice blasting method but i would tend to shy away from anything similar that incorporates  high pressure air or water...i have seen demonstrations using walnut shells and borax on a small scale level at old house conventions, not impressed...

when we need to remove paint from a component that is attached to a building, we have had good luck with dumond chemical's peel away 6 and 7 and smart strip...indeed, two applications are often required...apply liberally, cover with plastic (not the expensive paper that  is sold with the product) and let set over night...rinse and repeat...the product only works when moist hence the plastic (saran wrap, garbage bag, plastic roll, etc)...dumond claims these products are non-toxic and biodegradable...they at pH balanced, do not require neutralizing (peel away 1 does) and rinse clean with water...

if you plan to repaint, i would suggest removing as much paint as possible, sanding, priming and painting...if you plan to have a clear or natural oil finish, you may want to get used to referring to those stubborn areas of imbedded paint as 'charming' or 'rustic'...

remember to use lead safe removal methods...

...jade
jade mortimer
heartwood window restoration
26 forget road
hawley, ma  01339
413-339-4298
you can see right through our work.....
  ----- Original Message ----- 
  From: SCeccacci at aol.com 
  To: masshistpres at cs.umb.edu 
  Sent: Tuesday, September 09, 2014 10:16 PM
  Subject: [MassHistPres] dry ice blasting for paint removal


  Has anyone had experience with removing paint using the dry ice blasting method?  If so, what damage, if any, does it do to the substrate?  

  We have vertical tongue and grove wood sheathing on the front of a raised stage area in a lecture hall.  It is covered with multiple layers of paint dating possibly to as early as 1857. PeelAway paint remover removes the paint layers unevenly, peeling down to the substrate in some areas but leaving others intact.  This may be due to different types of paint applied to the area over time.  Would dry ice blast removal work better (more uniformly)?  What are its pros and cons?

  Susan McDaniel Ceccacci
  Jefferson, Massachusetts


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