Water Problem?
Thread Starter
Cruising
Joined: Aug 2009
Posts: 10
Likes: 0
Water Problem?
I working on an 81, my first paint job. I've helped with a couple of other jobs in the somewhat distant past, but this is my first attempt to do it myself.
I just sprayed the first coat of epoxy after razor blade stripping & sanding the car down to the glass. I didn't use any chemical strippers.
I've got a 60 gal Ingersoll Rand compressor and ran a short hose through an ice water bath to cool the air and condense the water vapor. From there I've got two filter traps and a dessicant dryer.
On the last panel I shot (driver's front fender), I've got quite a bit of fisheye in the epoxy. I washed and degreased the car twice with SPI waterborne. I checked my filter traps and had some water in the first one, but the second was dry. My dessicant had almost completely changed colors, so it pulled quite a bit of moisture out of the airline. My compressor only cycled on twice while shooting, and it was drained before I started, so I can't figure why I have so much water.
Any help is much appreciated.
I just sprayed the first coat of epoxy after razor blade stripping & sanding the car down to the glass. I didn't use any chemical strippers.
I've got a 60 gal Ingersoll Rand compressor and ran a short hose through an ice water bath to cool the air and condense the water vapor. From there I've got two filter traps and a dessicant dryer.
On the last panel I shot (driver's front fender), I've got quite a bit of fisheye in the epoxy. I washed and degreased the car twice with SPI waterborne. I checked my filter traps and had some water in the first one, but the second was dry. My dessicant had almost completely changed colors, so it pulled quite a bit of moisture out of the airline. My compressor only cycled on twice while shooting, and it was drained before I started, so I can't figure why I have so much water.
Any help is much appreciated.
Instructor
Joined: May 2009
Posts: 243
Likes: 0
From: salisbury missouri
im trying to paint my first vett to right now and im having problems to,but none with water here is how i set my shop up for my paint gun.
i have a 80gal craftsman compressor i bought a new 25ft hose and ran it up in the rafters from compressor then 10ft over to my door,then down the wall to a industral filter i bought from harbor freight for 40.00 from rafters this hose gos right in top of my filter water trap.
bought a new hose to connect to the filter and this is the hose that hooks to my paint gun i have no water problems.
i dont know if this will help but this is my setup in my 30x30 shop
this 40.00 water/filter at harbour freight is working very well it catches a lot of water sorry its only 30.00
http://www.harborfreight.com/cpi/cta...emnumber=98904
i have a 80gal craftsman compressor i bought a new 25ft hose and ran it up in the rafters from compressor then 10ft over to my door,then down the wall to a industral filter i bought from harbor freight for 40.00 from rafters this hose gos right in top of my filter water trap.
bought a new hose to connect to the filter and this is the hose that hooks to my paint gun i have no water problems.
i dont know if this will help but this is my setup in my 30x30 shop
this 40.00 water/filter at harbour freight is working very well it catches a lot of water sorry its only 30.00
http://www.harborfreight.com/cpi/cta...emnumber=98904
Drifting
Joined: Apr 2007
Posts: 1,442
Likes: 87
From: bluff dale tx
on very humid days water drops will form on the gun tip and explode onto the panel. but with it being only one panel i suspect you may have not got it dried off good. clean it and shoot another coat.
Thread Starter
Cruising
Joined: Aug 2009
Posts: 10
Likes: 0
I found some cratering on other panels and a few single fisheyes as well, so I think it may be due to condensation forming at the tip as you said. It was cool yesterday (mid-60s), but the humidity was up around 80%. How do I avoid this on subsequent shoots, just don't spray on humid days? If so, what is the cutoff you recommend on the humidity level? Thanks, porchdog (and all the other regular contributors). You guys are a wealth of knowledge and much appreciated.
Drifting
Joined: Apr 2007
Posts: 1,442
Likes: 87
From: bluff dale tx
i have the luxury of time so i can wait and pick my days. i discovered this years ago spraying a car for someone else in a really top shelf booth. dryer system on air and all. but was rushed for time so we went for it. cool and humid is not good . i could no figure out where it came from until i was spraying air at my hand and felt it. i got a piece of glass and was able to see the drop hit. crazy huh. i shut off at 50% and really like 30%. any temp under 60 will shut me down also and that goes for surface temp more than air temp. i just watch my weather station in the booth. one tip is to keep your hose off the cold floor until your ready to shoot. if you have moisture it will condense on the floor. hope this helps.
