All of the painted smc panels on the Pig had adhesion issues with the topcoat. I was able to sweep almost all of it off to bare white by hand with a razor blade. I bet the pressure washer would have worked better.
Todd Sullivan
Sully
77 royale
Seattle
>
> Todd,
>
> Funny you should mention this, when I was done I turned the door around and used the nozzle to blast the stripes off the door and it
> worked OK, NOT as fast as the foam inside but it took them off. It did not APPEAR to hurt the paint ON THE ALUMINUM. Obviously I
> have NO idea what it would do to the paint on the SMC (where the hell did I get SEM?).
>
> Keep in mind that this is an AVION and I have NO idea if the stripes on a GMC or any other aftermarket coach are the same material
> and applied the same way. If you intend to try this method BE CAREFUL!!!!!! If you screw up your paint job DON'T BLAME ME! ;-)
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> USAussie - Downunder
> USA '75 Avion - Double Trouble TZE365V100426
> AUS '75 Avion - The Blue Streak TZE365V100428
>
> -----Original Message-----
> From: gmclist-bounces [mailto:gmclist-bounces] On Behalf Of Todd Sullivan
> Sent: Saturday, September 06, 2014 6:55 AM
> To: gmclist
> Subject: Re: [GMCnet] GMC Foam Insulation Removal
>
> I think the SMC panels will hold up fine but if the adhesion of the oem paint to the smc ion your coach is similar to the paint on
> The Pig you might end up with bare white areas if you use it on the outside.
>
> Todd Sullivan
>
> Sully
> 77 royale
> Seattle
>
>>
>> Todd,
>>
>> When I left the USA to retire in Australia in 2002 one of the tools I brought with me was a Karcher 2400 psi gas powered pressure
>> washer. It came with one of the turbo nozzles. I have used it MANY times over the past 12 years and as noted below you can blast
> the
>> cement out between stones in concrete. THAT lesson was learned early on and subsequent to that I've NEVER damaged anything else.
>>
>> I reiterate; I am more concerned with damaging the fiberglass below the beltline and the SEM front and rear caps.
>>
>> Regards,
>> Rob M.
>> The Pedantic Mechanic
>> USAussie - Downunder
>> USA '75 Avion - Double Trouble TZE365V100426
>> AUS '75 Avion - The Blue Streak TZE365V100428
>>
>> -----Original Message-----
>> From: Todd Sullivan
>>
>> I could be and likely am wrong but isn't the gauge of aluminum on the door heavier than the walls? And the door has more closely
>> spaced studs with bonding surfaces. Maybe try the removal on the parts coach first?
>>
>> Todd Sullivan
>>
>> Sully
>> 77 royale
>> Seattle.
>>
>>>
>>> Kerry,
>>>
>>> I finished that panel in the door with the turbo nozzle at 90° and it did not effect the aluminum at all. I agree that 2800 psi
> is
>> a
>>> lot, however, keep in mind that the jet stream is small. Also if you look at the GMC frame the aluminum is epoxyed to it and the
>>> area of "free panel" is not very large.
>>>
>>> Actually I am FAR more concerned with damaging the fiberglass below the beltline or the SEM front and rear panels. I have used a
>>> turbo nozzle a lot before and if you're not careful you can erode the cement out around stones in concrete!
>>>
>>> If you notice the video started with a section of foam removed; that was me "experimental" area. I started about 8 inches away
> and
>>> slowly brought the nozzle closer until it began chopping up the foam and "blasting" it off. I'll do the same with the fiberglass
>> and
>>> SEM.
>>>
>>> Also I think I'll get a couple of the suits that asbestos removal workers wear along with a good pair of goggles and breathing
>> mask
>>> like automotive painters use.
>>>
>>> Regards,
>>> Rob M.
>>> The Pedantic Mechanic
>>> USAussie - Downunder
>>> USA '75 Avion - Double Trouble TZE365V100426
>>> AUS '75 Avion - The Blue Streak TZE365V100428
>>>
>>> -----Original Message-----
>>> From: gmclist-bounces [mailto:gmclist-bounces] On Behalf Of Kerry Pinkerton
>>> Sent: Friday, September 05, 2014 4:25 PM
>>> To: gmclist
>>> Subject: Re: [GMCnet] GMC Foam Insulation Removal
>>>
>>> Aaah, I'd be careful with a pressure washer on the aluminum panels. You're putting a lot of PSI into an aluminum panel and it
>> would
>>> not take much to stretch it. Sandblasters do it all the time, primarily because of the heat generated but metal acts just like
>> pizza dough under pressure, it stretches. I haven't TRIED to verify it can stretch the metal but I suspect it can. Certainly
> avoid
>> DIRECT 90 degree spraying.
>>> --
>>> Kerry Pinkerton
>>> North Alabama, near Huntsville,
>>> 77 Eleganza II, "The Lady", 403CI, Manny Brakes, 1 ton, tranny also a 76 Eleganza to be re-bodied as an Art Deco car hauler
>>
>>
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