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  #31 (permalink)  
Old 05-09-2007, 09:34 AM
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After cleaning with soap and water, The surface was wiped down with Painters Choice Pre-Clean, with blue shop rags (you get in a box of 200 at lowes). immediately after wiping down i wiped the pre-clean off with another clean rag and did not allow it to evaporate. after this was done, a tack cloth was used on the surface. might i add that the surface i am painting is 10 feet in the air and 18 feet long, the only way to paint is to walk on the surface behind my paint stroke. I walked with clean socks, no shoes. The amount of fish eyes would make me think that it has nothing to do with the socks.

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  #32 (permalink)  
Old 05-09-2007, 10:46 AM
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Sounds as if you did everything right on the wipe down Do you have an air line filter at the gun? Since this is a new set-up it could be contaminated with oil in the lines or possibly Teflon tape/dope if that was used anywhere?
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  #33 (permalink)  
Old 05-09-2007, 11:16 AM
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Quote:
Originally Posted by 71gtx
After cleaning with soap and water, The surface was wiped down with Painters Choice Pre-Clean, with blue shop rags (you get in a box of 200 at lowes). immediately after wiping down i wiped the pre-clean off with another clean rag and did not allow it to evaporate. after this was done, a tack cloth was used on the surface. might i add that the surface i am painting is 10 feet in the air and 18 feet long, the only way to paint is to walk on the surface behind my paint stroke. I walked with clean socks, no shoes. The amount of fish eyes would make me think that it has nothing to do with the socks.
Sounds like you prepped it right - what is it you are painting that is 10' in the air and 18' long?
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  #34 (permalink)  
Old 05-09-2007, 02:07 PM
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I had two filters at the gun back to back, the kind with the silicone beads or whatever they are inside.

Im a college student who quit working for Harley Davidson and built a mobile billboard from the ground up, my last step being paint and its going awfully wrong.

I talked to a guy at the paint shop and he recommended just using fish eye killer. What are the negative effects?
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Old 05-09-2007, 06:31 PM
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Sometimes I have seen tack rags that have ended up causing fisheye problems before.

This would be due to the "glue" residue on the tack rag getting transferred to the surface.

I've sometimes CAREFULLY used something more aggressive like lacquer thinner on the trouble spot areas and then re-cleaned with the prep wash - hard to do with fresh paint!

I'd clean the area, scuff the paint and let it sit open a couple of days open to allow the solvents to escape, clean again and put a sealer on it.

Keep the first couple of coats lighter to see if you get a reaction again - make sure you allow the recommended flash time between coats.
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  #36 (permalink)  
Old 05-14-2007, 09:32 PM
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Is it possible that the new air line I bought had contamination in it, and if so how would i go about running the line till it was clean?
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  #37 (permalink)  
Old 05-14-2007, 11:12 PM
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Quote:
Originally Posted by 71gtx
Is it possible that the new air line I bought had contamination in it, and if so how would i go about running the line till it was clean?
Rarely unless you were running straight from the compressor without a filter.

Are you doing this for a customer or for yourself? If this thing is going to be a rolling billboard some imperfections are ok...
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Old 05-15-2007, 09:33 AM
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it is for myself, and the way i built it it is pretty professional. i cannot have imperfections with the amount of time and effort i put into it, understanding that there are ways around it. im going to try some different approaches today and let you guys know what happens.
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Old 05-15-2007, 10:03 AM
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Quote:
Originally Posted by 71gtx
it is for myself, and the way i built it it is pretty professional. i cannot have imperfections with the amount of time and effort i put into it, understanding that there are ways around it. im going to try some different approaches today and let you guys know what happens.
I understand - I always overkill on quality of my projects too!

I just wanted to point out that someone driving by your billboard at 5mph or 50mph is going to only see the advertisement and not any imperfections
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Old 05-15-2007, 11:43 AM
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Quote:
Originally Posted by 71gtx
I had two filters at the gun back to back, the kind with the silicone beads or whatever they are inside.

If the filters have silicone beads inside, the silicone will be a killer on the adhesion of the finish. Microscopic particles will give you fisheyes.

As far as a filter, I have an old water/debris filter that has a belt clip on it. My air hose plugs onto that and the outlet side has a 5' hose to my gun. I just clip to my belt on my backside and spray away. No other filters/seperators and so far so good.

This is my other truck, painted 2 years ago. 400 wet sand on orig paint, then shot in my garage. (door was open and evap cooler going. No clear, just color.)

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Old 05-21-2007, 05:59 PM
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Ok, I've tested two more panels and Ive received similar results. I even added some fish eye eliminator to it and it appears similar.

When I am spraying the surface, there are a TON of dimples in the paint when it comes out. Im wondering now, my gun is a Kobalt gravity feed from Lowes. Could this be restricting the paint flow or potentially not be the right gun for enamel based paints?
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Old 05-21-2007, 06:25 PM
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This still sounds like surface contamination but if the gun is new did you tear and down and clean it before using it? Probably not the problem since you have tried this several times. The shop rags themselves maybe? I ran into that problem sometime back with some paper towels that were clean but something in the towel itself caused the problem. Try some wiping rags made just for painters.
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  #43 (permalink)  
Old 05-21-2007, 09:47 PM
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Quote:
Originally Posted by 71gtx
Ok, I've tested two more panels and Ive received similar results. I even added some fish eye eliminator to it and it appears similar.

When I am spraying the surface, there are a TON of dimples in the paint when it comes out. Im wondering now, my gun is a Kobalt gravity feed from Lowes. Could this be restricting the paint flow or potentially not be the right gun for enamel based paints?
Can you get a decent picture of the paint problems?

The gravity feed gun could be a problem - I've seen some guns assembled with too much lube in the packings - it could also have an incorrect tip for spraying stains or something other than an automotive grade paint.

What gun and material did you use to primer the sign with?

Did you spray a sealer first before applying the topcoat?
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Old 05-22-2007, 09:16 AM
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What kind of material is this made of? Is it a steel panel? Was your first coat of primer sprayed onto the panel itself or was the surface already coated with some other type of coating? This is really puzzling since you have apparently taken the time to do this right.
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  #45 (permalink)  
Old 05-23-2007, 09:59 AM
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I will get pics asap. The surface is 1/8th inch aluminum, sanded very thoroughly and primed with a self-etching sealer. The sealer seemed to go on better but it was a different consistency so its hard to say. The paint shop set me up right for aluminum. I feel like the gun may not be allowing enough paint to flow. I will try a different gun, pick up some diffferent rags, and possibly add a little bit more reducer and see what i get.
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