Right. In refinishing a Knabe grand years ago that had been been in a tornado, I discovered this, much to my chagrin. Heat index in excess of 118 degrees. The only time of day that I could find the temp. below 90 was 3:00 A.M. I finally got all the wax out with the use of a product called "Gillespie's Refinisher" (which I still use and like very much for most of the older finish removing) and a fine brass brush. Gillespie's has no wax and helps to even out the stain as well as removing the old "alligatored" varnish. Fran Helms, Topeka, KS >>> "John Ross" <jrpiano@win.eastlink.ca> 04/28/05 12:24 PM >>> Temperature above 90F, I wish. :-) Good point though. John M. Ross Windsor, Nova Scotia, Canada jrpiano@win.eastlink.ca ----- Original Message ----- From: "FRANCES HELMS" <fhelms@topeka.k12.ks.us> To: <pianolac@bestweb.net>; <pianotech@ptg.org> Sent: Thursday, April 28, 2005 1:28 PM Subject: Re: refinishing frustrations > Just want to mention that when using strippers with wax make sure > temperature does not exceed 90 degrees. If it does so, the wax tends to > melt into the pores, causing yet another problem. > Fran Helms, > Topeka, KS > >>>> <pianolac@bestweb.net> 04/28/05 1:14 AM >>> > With all due respect to Chris and Mark, the size of one's shop should not > dictate whether you use an environmentally responsible, efficient, > effective and non-toxic material for stripping the finish off of pianos. > > There aren't any "waterbased" strippers. There are various water soluble > strippers that use relatively benign chemicals to do the stripping. Dyna > 2 > is essentially a hyper-soap. It wets the old coating to the bare wood, it > does it in one application, and because of that fact, it is the least > expnesive way to strip a piano. The highest cost input for this job is > labor. If you can save one or two applications of stripper, you're saving > a lot of time and money. > > There are side benefits of using a stripper like Dyna 2. There's no wax > in > it, yet it forms an exterior shell that prevents evaporation. If you fail > to remove all the wax from a methylene chloride stripper, you leave > yourself open to craters and fisheyes. Dyna 2 is also an effective > silicone emulsifier, so it grabs furniture polish that penetrates into the > pores. Doesn't always get all of it, but since I've been using it, I > haven't had one instance of silicone contaminated wood. > > I also like the idea of not burning my hands and arms and not spewing > forth > toxic fumes in the air, and toxic waste into our environment. > > Arthur Grudko > www.pianolac.com > > >>Farrell <mfarrel2@tampabay.rr.com> wrote:The methylene chloride (I think > that's right) type with the layer of wax that forms to minimize > evaporation? >> >>Yep. Works in 15-20 minutes. About 2 1/2 gal. to strip a typical 5ft.7" > grand. A good fit for small shops that don't have room to lay out all of > their parts for the several hours/overnight time frame required by the > water-based strippers. Yea, it's nasty - so precautions are in order. I > still prefer it to the water-based strippers for efficiency in my shop. > And remember, I am a LONG-TIME water-base finisher, and do try to avoid > the > stronger solvents when there are alternatives that work well with my > workplace. >> >>Mark Potter >> >> >> > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives >
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