FWIW some of my mouldings had a plastic film simmilar to what andrew
described, but mine
was orange in colour and so easy to spot, and embedded in the resin in a few
spots, normally around complex
corners etc, i just sanded the offending bits out as i went, as you suggest
keith i believe it is a part of the
bagging process and small pieces are getting trapped in the resin
craig
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of Keith
Hickling
Sent: Sunday, 20 July 2008 11:11 AM
Subject: Re: Europa-List: Removing PVA release agent
<keithhickling@clear.net.nz>
Andrew,
I think what you are describing is plastic film remaining from the moulding
process (? part of vacuum bagging process). As I mentioned, Andy told me
there is no release agent on the non-moulded surfaces - ie on the underside
of the cockpit module. All I found was excess epoxy ridges and small pieces
of plastic film that was adherent in parts.
If that's what it is, and you are talking about the underside of the CM that
bonds to the fuselage, by the time you have sanded the bonding surfaces to
remove the epoxy ridges, leaving a fairly flat surface, you should find that
virtually all the plastic remnants are removed.
Keith Hickling.
----- Original Message -----
From: "Andrew Sarangan" <asarangan@gmail.com>
Sent: Sunday, July 20, 2008 6:05 AM
Subject: Re: Europa-List: Removing PVA release agent
>
> Ron
>
> I used Palmolive dish soap and hot water. Made me sweat like a pig in
> the 90-deg weather:-) I could only see small shreds of transparent
> plastic wrap stuck to various surfaces. I am assuming this is the PVA
> agent that has dried to form a thin film. I can peel off small chunks,
> but I can't tell how much of the entire surface is covered with this
> film. Most importantly, I tried soaking one of these pieces in hot
> water and soap and it showed no tendency to dissolve even after an
> hour. So obviously I am looking at the wrong stuff, or this is a lot
> harder to remove than I had assumed.
> Any thoughts?
>
>
> On Fri, Jul 11, 2008 at 2:33 PM, <rparigor@suffolk.lib.ny.us> wrote:
>>
>> Hi Andrew
>>
>> "I am not sure what the PVA release agent looks like. My cockpit module
>>> has very thick glossy stuff all over the the underside. It looks more
>>> like excessive epoxy. But I am concerned if this might be the PVA
>>> release agent. If so, it's not going to come off with any amount of
>>> washing in soap and water. Some heavy duty sanding would be in order.
>>> Does anyone have some advice on this?"
>>
>> Use the hottest water you can tolerate, we used just plain green
>> Palmolive
>> dish washing soap (great hand cleaner)and scotchbright pad. Once water
>> sheets rather than beads up you can switch to plain water and
>> scotchbright. You need to rinse off all the soap which is no trivial job.
>> Just keep rinsing, you could use green scouring pads (for sinks) as well.
>> When you think you got it all off, use some hot water "when" you see
>> bubbles forming, keep at it.
>>
>> Ron Parigoris
>>
>>
>>
>>
>>
>>
>>
>>
>
>
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