ventilation requirements?

[mhorowit]

I'm not there yet, but I can see myself priming ailerons and tailfeathers with two-part, using a brush. In the basement.

Wonder if a simple ventilation fan is enough or is this the sort of thing I need to do outdoors?

Second, once primed, I could cover said parts. Assuming PolyFibre through the installation of inspection rings. CAn that be done with simple ventilation?
- MikeH

[fearofpavement]

Re: ventilation requirements?

Well, even with a vent fan the fumes will travel throughout the house. I would say to give it a try and see how bothersome it is. (start with something small)

[1938BF50]

Re: ventilation requirements?

If the process allows, make sure to thin enough to eliminate brushmarks on anything that shows. I did the same on jury struts(etc) and they look like crap....full of brushmarks. I will sand and reshoot with gun later.

[mhorowit]

Re: ventilation requirements?

If the process allows, make sure to thin enough to eliminate brushmarks on anything that shows. I did the same on jury struts(etc) and they look like crap....full of brushmarks. I will sand and reshoot with gun later.

everything primed with a brush will be covered. Thanks - MIke

[Guest]

Re: ventilation requirements?

Hi Mike,

Got your PM, nice to hear from you.

Sometimes these projects take awhile, its hard to make them first priority and we probabaly wouldn't find it as much fun if we did that.

I had a thought about the ailerons. Before you cover or get too far put them on the wing and make sure the trailing edge lines up the way you want it to.

If they don't you can make adjustments before you get too far like having the fabric on.

Dave

[Buell Powell]

Re: ventilation requirements?

The first coat of Poly Brush is applyed with a brush. Be sure to have GOOD ventulation when you do that. Breathing the fumes is dangerous-I have heard of people almost passing out before they were able to get away from the fumes. Also you need a good respirator when you spray on any of the MEK based coatings-check out the warnings listed on the cans. You can apply epoxy primer directly over Zink Chromate primer without scuff sanding it. Instead of bushing on primer-after you have the steel parts ready to prime you can take the parts outside and spray on a light coat of zink chromate with a spray can -(it can be sprayed on very easily and doesn't make a slick surface or tend to run so you don't have to be very careful about applying it).to keep them from rusting until you can spray on epoxy primer with a compressor. Hope this helps

[astjp2]

Re: ventilation requirements?

Dont forget that zinc Chromate is only used on Aluminum, you need red oxide primer for steel parts. One more thing, when you vent, do not use a fan for EXHAUSTING the fumes, it could blow up your house or garage(;f, use the fan to overpressure the room that you are spraying in, and have another window or door open to exhaust the fumes. Tim

[Buell Powell]

Re: ventilation requirements?

Dont forget that zinc Chromate is only used on Aluminum, you need red oxide primer for steel parts. One more thing, when you vent, do not use a fan for EXHAUSTING the fumes, it could blow up your house or garage(;f, use the fan to overpressure the room that you are spraying in, and have another window or door open to exhaust the fumes. Tim

I wanted to make sure I wan't giving bad information about using Zink Chromate on steel so I called Poly Fiber and checked my covering manual to be completly sure. I think we are both right. The one part Zink Chromate (Tempo spray cans)is listed for both steel and aluminum. The problem is that unless you apply epoxy primer on top of it(which I do on the small parts I was talking about and a lot of others do this as well) the MEK in Poly Fiber will desolve or lift it and if not top coated with epoxy primer the zink chromate doesn't seal as well and protect from moisture as well as epoxy primer.The Poly Fiber covering manual states that EP 420 will not damage one component primers therefore there is no need in removing old sound primers before applying Epoxy primer. Poly Fiber makes a 2 part zink chromate that is used that does not need a top coating but I use the EP 420 primer.The best way for priming fuselages etc is to apply the EP 420 epoxy primer directy on the bare metal(making sure it is clean and moisture free). Also I was curious about the old zink chromate and the newer stuff. The old original yellow zink chromate that was used on all the old steel parts has a chemical that the EPA considered to hazardus so it was replaced with a different chemical. The new zink chromate is white and is pigmented to the green or yellow. According to what I was told the new is just as good as the old zink chromate but just has replaced the hazardus chemical with one that is not hazardus.
The person I talked to hadn't heard of using Red Oxide on aircraft parts(or me either)but recomended spraying epoxy primer over it and checking to make sure the epoxy primer didn't tend to wrinkle or crawl and thought it would be OK if it is an approved primer.
Hope this helps

[mhorowit]

Re: ventilation requirements?

I had a thought about the ailerons. Before you cover or get too far put them on the wing and make sure the trailing edge lines up the way you want it to.

If they don't you can make adjustments before you get too far like having the fabric on.

Dave

You're talking about making any adjustments by moving the attach fittings mounted to the spar, correct? - MikeH

[Hank Jarrett]

Re: ventilation requirements?

Problem with exhaust fans is the brushes in the motor can blow you up when they set the fumes off. Problem with a pressurizing fan is it will pump the fumes all over your house (almost all will go out the exhaust hole, but the tiny part that goes through every crack and door frame will make your house stink like a paint booth). The real answer is a belt drive exhaust fan or an explosion proof fan motor exhausting the booth. Your house will still stink like H**L, but "maybe" your wife won't beat you senseless after the first time.
The real solution is a stand alone paint building. I did one in the back yard with one of those "tent things" and my wife still raised cain about the smell.
Hank

[Forrest Barber]

Re: ventilation requirements?

We have a "dope" room , whole room is a paint booth separate exhaust vents with an explosion proof motor of course. I use the old Hobby air breathing system taht brings clean air from a separate source into a mask & hood that puts my head under positive pressure works great. I use a LPHV system for dope and Binks gun for the other stuff.
Any comments on Dupont Vari-Prime, self etching spray cans?

[astjp2]

Re: ventilation requirements?

I found it was easier to give the Other Half money and send her shopping when I am spraying.....They come back in such a better mood.........

[wlas]

Re: ventilation requirements?

I don't paint tail feathers any more, I send all metal parts to the powder coater. They do it cheaper than I can paint it.