X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 02 Dec 2005 18:17:05 -0500 Message-ID: X-Original-Return-Path: Received: from imo-m24.mx.aol.com ([64.12.137.5] verified) by logan.com (CommuniGate Pro SMTP 5.0.3) with ESMTP id 860445 for lml@lancaironline.net; Fri, 02 Dec 2005 11:19:51 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.5; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m24.mx.aol.com (mail_out_v38_r6.3.) id q.1ab.44a12310 (4410) for ; Fri, 2 Dec 2005 11:19:03 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: <1ab.44a12310.30c1cdf7@aol.com> X-Original-Date: Fri, 2 Dec 2005 11:19:03 EST Subject: Re: [LML] Flying in primer question X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1133540342" X-Mailer: 9.0 Security Edition for Windows sub 5300 X-Spam-Flag: NO -------------------------------1133540342 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 12/2/2005 12:21:44 A.M. Central Standard Time, jon4544@yahoo.com writes: Looking for comments on the pros or cons of sanding the last coat of primer. I intend to fly in primer for a few months and have mixed feelings about sanding the primer to make it slipperier. I've heard that it should be wet-sanded with 320 and also that it's better not to sand it as opens up the primer to absorbing moisture and dirt. John, IMHO, don't sand. This will make the preparation for paint much easier since cleaning and finish sanding could be better for the paint process. If the sanded primer is a two-part epoxy it should not absorb moisture, dirt or oil but the early sanding could make the final cleaning/prep harder. Side note: I flew for 1.5 years in sanded WLS primer and it was hard to clean before painting. Also, I had Krylon-painted numbers on the primer that, while it was easy to clean off with acetone, resulted in a slight raising of the primer area under the numbers, but that disappeared after about 4-6 months post painting (PPG base coat, clear coat). If I had to do it over again, I would have had the painter put on another coat of primer just before painting. Also, the sanded WLS primer generated a good deal of skin static during flight and that went away after painting. I was glad I flew in primer because I had a number of experiments (trim tabs, cowl modifications) that required skin changes (i.e. they didn't work as planned). Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) -------------------------------1133540342 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 12/2/2005 12:21:44 A.M. Central Standard Time,=20 jon4544@yahoo.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

Looking for comments on the pros or cons of sanding t= he=20 last coat of primer.

I intend to fly in primer for a few months and have mixed feeli= ngs=20 about sanding the primer to make it slipperier. I've heard that it sh= ould=20 be wet-sanded with 320 and also that it's better not to sand it as opens u= p=20 the primer to absorbing moisture and dirt.

John,

IMHO, don't sand. This will make the preparation for paint much=20 easier since cleaning and finish sanding could be better for the paint=20 process. If the sanded primer is a two-part epoxy it should not=20 absorb moisture, dirt or oil but the early sanding could make the final= =20 cleaning/prep harder.

Side note: I flew for 1.5 years in sanded WLS primer and it was h= ard=20 to clean before painting. Also, I had Krylon-painted numbers on the pr= imer=20 that, while it was easy to clean off with acetone, resulted in a slight rais= ing=20 of the primer area under the numbers, but that disappeared after about=20= 4-6=20 months post painting (PPG base coat, clear coat). If I had to do it ov= er=20 again, I would have had the painter put on another coat of primer just befor= e=20 painting.

Also, the sanded WLS primer generated a good deal of skin static during= =20 flight and that went away after painting.

I was glad I flew in primer because I had a number of experiments (trim= =20 tabs, cowl modifications) that required skin changes (i.e. they didn't work=20= as=20 planned).

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)

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