GL: Side curtains / Pledge

[Keith]

I think  you need to go back and read both postings below. First, you did 
not specify that your recommendations pertained only to acrylics and 
polycarbonates. What you did say was "...your canvas guy was mistaken..." 
which he wasn't, then you go on to say "Citric oils and acids will cause 
crazing - small internal fractures in most plastics" which they don't.

Also, I did not state that all plastics are unaffected by these acids and/or 
solvents as you posted. Go back and read my post again, and don't mis-state 
what I said. It's right there in black and white.

As far as putting "chemist" in quotation marks, the degree is from the 
University of Houston, 12/13/1986. It's hanging on the wall right above my 
desk, along with the MBA.



Keith
_____
If at first you don't succeed, try management.
----- Original Message ----- 
From: "John & Judy Gill" <twojscom at quadnet.net>
To: "Keith" <keith at anastasia3.com>; "Loop List Great, Loop List" 
<great-loop at lists.samurai.com>
Sent: Thursday, August 02, 2007 8:50 PM
Subject: Re: GL: Side curtains / Pledge


> Keith,
>
> Yes, I am aware that some plastics are not affected by citric acids  and 
> or other solvents.  That is why I SPECIFICALLY stated that my 
> recommendations pertained only to acrylics and polycarbonates (both 
> manufactured by Rohm and Haas.
>
> For you to state as a "chemist" that all plastics are unaffected by  these 
> acids and/or solvents is steering the boating public in the  wrong 
> direction in my opinion.
>
> I even offered the R&H recommendation for a one percent solution of a 
> dishwashing liquid (without lemon oil) and distilled water as an 
> inexpensive cleaner ( one tsp to a pint of water).  What could be  cheaper 
> or more effective???
>
> If you have minor scratches or abrasions, J-Wax Kit or Simonize paste  wax 
> works very well to fill in minor scratches or abrasions.
>
> John
>
> ==================================
>
>
> On Aug 2, 2007, at 7:49 AM, Keith wrote:
>
>> John Gill wrote: "Sorry to say that your canvas guy is mistaken,
>> particularly with
>> regard to acrylics (Plexiglas and Lucite) or polycarbonates (Tuffak
>> and Lexan).  Citric oils and acids will cause crazing - small
>> internal fractures in most plastics.
>>
>> John Gill
>> (a former writer of design and fabrication manuals for Rohm and Haas
>> Company which invented Plexiglas acrylic)."
>> _____________________________________
>> I'm sure you understand that the clear side curtains are NOT any of  the
>> above materials. They are made of plasticized PVC (poly vinyl  chloride) 
>> or
>> "vinyl" for short. Myself and others have used lemon Pledge for  years, 
>> and
>> it works great on those materials. No need to look for non-scented.
>>
>> Also, acids don't always cause crazing in most plastics... why does
>> hydrofluoric acid come in plastic bottles? Because it'll dissolve  glass!
>> Muriatic (hydrochloric) acid comes in plastic bottles as well. Many 
>> other
>> plastics are used specifically around acids because of their non- 
>> reactive
>> nature.
>>
>>
>>
>> Keith (chemist)
>> _____
>> Opportunities always look bigger going than coming.
>> _______________________________________________
>> http://lists.samurai.com/mailman/listinfo/great-loop
>>
>> To modify your Great-Loop subscription options (change email address,
>> unsubscribe, etc.) go to: http://lists.samurai.com/mailman/options/ 
>> great-loop