Painting Has Begun!!!! - Page 9

Dave62 · #81 02-12-2009, 09:58 AM

Frank,
You probably already know this but they make fish eye remover for most paints. This is an addative that goes in the paint. Fish eyes are caused by a variety of contaminates...with silicone being number 1. Fish eye remover will only help a little....remember the area of fish eyes must be throughly sanded and cleaned....or the darn things will show up again in the same place!

Hope this helps.
Dave (the Swift driver)

fstringham7a · #82 03-03-2009, 04:53 PM

Started the paint job August 2008 and here it is March 2009 and all that is comlete is the fuse and the cowl and 90% of the VS/Rudder.

As the story goes fish eyes. The story continues with trying to find what the problem was..............In my last installment I determined that my propane heater was the culpurit. Well not so fast!

I finally tore into the water/oil filter/regulator/and lines leading to the quick disconnect. What do you know.......Water and oil droplets were found. So after denial of many that the problem was not the heater but the Compressor/Filter/Pipes out of regulator/regulator/ I have to eat CROW!!!!!!!!!

I got a new fluid elimination filter. I then took the system a part including the regulator and cleaned everything to eliminate the offending water and oil. I also purchased a new Motorguard oil elimination Filter that will be the last line of defense in getting rid of the nasty oil droplets/mist.

My analysis is that during the cool somewhat wet month of January here in the Desert of SW Utah there was enough water in the system to overwhelme the the cheap Kobalt fluid filter. At that point the whole system...paint gun/pressure lines/filters/regulators/hose were all contaminated. The fuse and the cowl were all painted when it was pretty dry and warm...

So what to do with the time while I wait for the new filter. I decided to build this apparatus. Any guess as to what it is used for

Frank @ 1L8 ...RV7A... 4.5 years and counting...it will be done when it is done

szicree · #83 03-03-2009, 05:06 PM

Not sure if you've changed things since the pic of you in your painting suit, but it looks like there is no filter at the gun. If not, you really should give it a try. They're only a couple of bucks, made of plastic and screw right into the bottom of the gun. I say that no matter how fancy a line filter you use, there is still some moisture by the time you get to the gun. These little disposable filters are your last line of defense.

Jerry Fischer · #84 03-03-2009, 05:19 PM

Looks like a stand to paint the wings/fuselage with the painting being done on the top surface. But that's just a guess

fstringham7a · #85 03-03-2009, 05:39 PM

Thanks for the info. I did try the motorguard filter that has a dessicant (Silica Gel...)at the gun. Didn't work. I still shot fsh eyes in my very last practice session. This was before taking the system a part.

This fact is a bit puzzeling to me in that Silica Gel not only elininates water but also oil vapor.

http://www.alibaba.com/product-free/...Desiccant.html

"Silica Gel is available in porous, granular, and amorphous form chemical reaction between Sulfuric acid and Sodium Silicate. The internal structure of Slilica Gel is composed of a vast network of interconnected microscopic pores which attract and hold water, alcohol, hydrocarbons, and other chemicals by the phenomena known as physical adsorption and capilary condensation."

My thought is there was just a whole bunch of oil vapor which overwhelmened the system.

I will use a new one at the gun when i get the new oil elimination filter installed for that as you said, "last line if defense."

Frank @ 1L8 ...RV7A...

Quote:

Originally Posted by szicree

Not sure if you've changed things since the pic of you in your painting suit, but it looks like there is no filter at the gun. If not, you really should give it a try. They're only a couple of bucks, made of plastic and screw right into the bottom of the gun. I say that no matter how fancy a line filter you use, there is still some moisture by the time you get to the gun. These little disposable filters are your last line of defense.

fstringham7a · #86 03-03-2009, 05:48 PM

Quote:

Originally Posted by Jerry Fischer

Looks like a stand to paint the wings/fuselage with the painting being done on the top surface. But that's just a guess

Jerry

Your the Man on this one. It is going to be (hopefully) a rotisserie.

The outboard portion of the wing will have an appartus attached to the tooling holes that will have a 2 inch galvanized pipe attached that will set in the saddle formed between the two 2X4. The inboard apparatus will be attached to the main spar and will be used to turn the wing.

The Forward and Aft areas of the wing will be primed/painted with the wing in the usual horizontal position. The bottom and top of the wing will be painted in the more fun position of vertical.......

Frank @ 1L8 ...RV7A...

frankh · #87 03-03-2009, 05:57 PM

Is it really worth NOT spending 200 or so plus a new airline and avoid the problem completely?

The cost of the paint to correct mistakes is more than the compressor will cost..

Frank1

fstringham7a · #88 03-03-2009, 07:39 PM

Quote:

Originally Posted by frankh

Is it really worth NOT spending 200 or so plus a new airline and avoid the problem completely?

The cost of the paint to correct mistakes is more than the compressor will cost..

Frank1

Hi

Good point....I do have an oilless compressor. The problem with it and all the oilless compressors that I looked at is that they will not keep up with air the needs of the paint system I am using (too low cfm). The compressor gets real hot real fast under the continuious duty of the 21 psi needed to run the hvlp gun (Devilbiss Fiinishline 1.3).

I bought a Cambell Husfeld 80 gal 16.1 cfm @ 90 psi and it has performed flawlessly at least where the air needs are considered. It is true that appropriate filtration is needed. During October and November I painted the Fuse and Cowl and everything went great. It wasn't until January during the rainy season that the filtration system gave out. If I would of had an oil elimination filter and a filter at the gun I know the problem just would not have been a problem. AND the plane would be painted and well on it's way to being put together and ready for flight. But as we all know IF..................is not reality and reality always IS WHAT IT IS!!!!!!!!!!!!

So I press forward knowing that once I get the new oil removal filter and the last in line filter at the gun, and I hold my gun in the right way at the right distance and the right speed, and lean at no more than 10 degrees to the starboard, and move my feet no more than 24 inch apart, and always smile JUST slightly, and pray to the great paint diety Chip Foss, and tell my wife I love her, and make sure that the humidity is no more than 10% and the sun is at the appropriate angle to the earth.....................well you get the idea.....painting has alot of things to consider.

Frank @ 1L8 ...RV7A...

I got a good deal on a Campbel Huasfeld at Lowes. 80 Gallon

fstringham7a · #89 03-03-2009, 07:44 PM

Quote:

Originally Posted by frankh

Is it really worth NOT spending 200 or so plus a new airline and avoid the problem completely?

The cost of the paint to correct mistakes is more than the compressor will cost..

Frank1

Hi

Good point....I do have an oilless compressor. The problem with it and all the oilless compressors that I looked at is that they will not keep up with air needs of the paint system I am using (too low cfm). The compressor gets real hot real fast under the continous duty of the 21 psi needed to run the hvlp gun (Devilbiss Fiinishline 1.3).

I bought a Cambell Husfeld 80 gal 16.1 cfm @ 90 psi and it has performed flawlessly at least where the air needs are considered. It is true that appropriate filtration is needed. During October and November I painted the Fuse and Cowl and everything went great. It wasn't until January during the rainy season that the filtration system gave out. I also must admit that I also installed the filter improperly which is also part of the problem found when I tre into the lines to see where the problem was at. If I would of had an oil elimination filter and a filter at the gun I know the problem just would not have been a problem. AND the plane would be painted and well on it's way to being put together and ready for flight. But as we all know IF..................is not reality and reality always IS WHAT IT IS!!!!!!!!!!!!

So I press forward knowing that once I get the new oil removal filter and the last in line filter at the gun, buy the new hose, and I hold my gun in the right way at the right distance and the right speed, and lean at no more than 10 degrees to the starboard, and move my feet no more than 24 inch apart, and always smile JUST slightly, and pray to the great paint diety Chip Foss, and tell my wife I love her, and make sure that the humidity is no more than 10% and the sun is at the appropriate angle to the earth.....................well you get the idea.....painting has alot of things to consider.

Frank @ 1L8 ...RV7A...

I got a good deal on a Campbel Huasfeld at Lowes. 80 Gallon

Captain Avgas · #90 03-04-2009, 05:10 AM

Quote:

Originally Posted by fstringham7a

Started the paint job August 2008 and here it is March 2009 and all that is comlete is the fuse and the cowl and 90% of the VS/Rudder.

The really amusing thing is that in your very first post on this thread back in August 08 you stated that you expected the painting process to take you "at least a month".