---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Mon 06/13/05: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:34 AM - Variprime and Alodine (Don Boardman) 2. 07:38 AM - Variprime and Alodine (Don Boardman) 3. 07:57 AM - Re: Variprime and Alodine (Ernest Martinez) ________________________________ Message 1 _____________________________________ Time: 07:34:35 AM PST US Subject: Yak-List: Variprime and Alodine From: Don Boardman --> Yak-List message posted by: Don Boardman I forgot to mention that the 701 was built of bare 6061-T6 aluminum and not an Alclad situation. Not sure if this is a factor or not. Regards, Don B. ________________________________ Message 2 _____________________________________ Time: 07:38:24 AM PST US Subject: Yak-List: Variprime and Alodine From: Don Boardman --> Yak-List message posted by: Don Boardman Hi Ernie, Craig, I am in no way a paint expert but I thought I would pass on my experience. When investigating the painting of my CH701 STOL I was told that the self etching primer would do fine by itself. I was also told that an acid etch and alodine treatment for a full paint job (verses a repair) could not hurt and might be a good idea. I elected to acid etch and alodine and then shoot with Dupont Variprime. I used Dupont's basecoat clearcoat system and after 14 years the plane (hangered) looks as good as the day it was sprayed. It is possible that something has changed with the variprime's formula that might not like the alodine ...? Check with your paint vendor. I found the variprime easy to use. Seems more and more though epoxy primers are being recommended. I will be having to make some new paint decisions this winter. My M-14PF powered Murphy Moose now has 15 hours on it and loving every minute!!!! Don Boardman & Partner, Randy Bowers N622D Double Duce Delta Moose ..."Smoky" #130 M-14PF 400HP, MT-Prop/Beta, Aerocet 3500 amphibs Delta Lake, Rome, NY Time: 04:15:52 PM PST US From: Ernest Martinez Subject: Re: Yak-List: Dzus replacements and paint --> Yak-List message posted by: Ernest Martinez I used Variprime self etching primer. It does the same thing as acid etching, which is to dull the surface to create a better so paint can adhere. The acid etch also will remove the alclad off of NEW aluminum. Alodine is to prevent corosion. You arent going to get any corosion on your beautiful anodized aluminum, unless you've been a little too aggressive with your stripping and have removed the anodizing. In my case there were small patches where the anodizing was gone, but I didnt worry about it since the primer will protect it. Also, if you plan on using Variprime, you CANT use alodine, it will adversly react with the conversion coating in the primer. I acid washed my airplane in order to get every last bit of paint remover and finger prints off of the airplane immediately before shooting the primer. But that was kinda overkill, A good soapy washing would have been sufficient. Just remember to sand the primer before shooting the top coat. I start with red scotch brite pads , then wet sand with 400 grit. Bottom line is that acid etch/alodine is the old fashioned way to do things, its not wrong, its just that you dont need to jump through all those hoops with todays technology. Ernie On 6/10/05, Cpayne wrote: > --> Yak-List message posted by: Cpayne > > Has anyone replaced the twistlock fasteners on 'changs with Dzus fasteners? They look so much alike but I'm not sure about sizes. I'd appreciate any help on how to do this. Hoping to use stainless as I'm still preping for a paint job and now is a good time for such goodies. > > Speaking of paint, for those who had their Yaks or CJ's repainted by a professional shop...what did they do to prep? Acid etch and alodyne over the anodized finish, self-etching primer? What? > > Craig Payne ________________________________ Message 3 _____________________________________ Time: 07:57:15 AM PST US From: Ernest Martinez Subject: Re: Yak-List: Variprime and Alodine --> Yak-List message posted by: Ernest Martinez Don, I cant swear to the Variprime over Alodine problem, since I'm no paint expert, I was just re-iterating what the paint rep told me, but apparently it worked well for you. Ernie On 6/13/05, Don Boardman wrote: > --> Yak-List message posted by: Don Boardman > > I forgot to mention that the 701 was built of bare 6061-T6 aluminum and not > an Alclad situation. > Not sure if this is a factor or not. > > Regards, > Don B. > > > > > > >