Water droplets on painted panel
Discussion
The paint I did this morn as a whole I think is ruined by blisters as can be seen in the pictures.
I think it is going to have to all be totally flattened with 400 grit and start again??
Some of the water droplets were large whereas most areas are as per the pictures.
All areas were properly degreased and tack clothed before painting.
Any advice is massively appreciated.
I think it is going to have to all be totally flattened with 400 grit and start again??
Some of the water droplets were large whereas most areas are as per the pictures.
All areas were properly degreased and tack clothed before painting.
Any advice is massively appreciated.
gi daddy said:
Iver water in the air line ,or to cold to spray cellulose.it at least needs to be 24c .your panels need to be flatted and re coat ,try one panel first ,Don't spray a cold panel.
HiIt is 2 pack and not cellulose.
To be honest it is pretty warm where I am spraying.
Would you therfore conclude that this is definately moisture in the air line?
I have ordered a small inline filter so hope that does the job.
It is such a shame as I am sure you know it is a lot of work to re-prepare the areas.
Thanks for your input
gi daddy said:
you definitely panel wiped your panel ,then before letting it evaporate wiped it of quick.Because looking at your pics it seems to be were your hinges are ,what get oiled .if you say you panel wiped it ,then you need a water trap.
All the panels are affeced, it just so happens that I pictured it near the hinge.All panels were spotless.
It must be moisture.
Are the inline cannisters/filters upto the job?
snuffle said:
pm sent, it may be easier to explain things over the phone
edit
PM not sent you have emails blocked, accept them and i'll send you my phone number
will check tomorrow night, as working all day.
Thank you, thats very kind.edit
PM not sent you have emails blocked, accept them and i'll send you my phone number
will check tomorrow night, as working all day.
Edited by snuffle on Sunday 4th September 22:31
I do not know why my PM's were not allowed but I have sorted it now.
I have been given an air fed mask by the bodyshop but opted to use a 40 hour full face dissposable mask instead as I do not think my compressor is big enough to power that and the paint gun, but......
I just had a look and the mask comes with a large regulator cannister and an air filter cannister.
I can try this and hopefully this will do the job.
Cheers
Some of those pics show crater type lumps as opposed to just water droplets which could indicate some sort of silicon interaction. Difficult to see in the pics.
If you spray a spray out card as opposed to the bonnet youll find out if its the equipment, an in line filter will help but certainly not cure the problem. Devillbiss whirlwinds are a good quality cheap way of reducing moisture.
Good luck.
If you spray a spray out card as opposed to the bonnet youll find out if its the equipment, an in line filter will help but certainly not cure the problem. Devillbiss whirlwinds are a good quality cheap way of reducing moisture.
Good luck.
snuffle said:
Phone number sent by Email.
Shout if you need advice.
Really good of you that, thanks.Shout if you need advice.
I spent a couple of hours today sanding out the blisters with 400 grit then 800 grit in preparation for applying 2 more coats of paint, hopefully tomorrow.
As I said before it is such a shame the way I had these blisters because I would have been delighted with the job so far otherwise.
I will use the filter and see how I go. I think I will try the front of the bonnet or door instead. I know it is a much more prominent area but at least if I get problems it is much easier to sand a flat panel than in this case the back.
I will keep you posted!
That is a real shame.
This might be the bleeding obvious / teaching you to suck eggs post of the day, but do you blow the fully pressurised air tank from the bottom valve to remove water from the tank before starting spraying? There could be quite a build up of water in the tank.
If you don't do this fairly frequently, you may find that the in line filter will be ineffective.
This might be the bleeding obvious / teaching you to suck eggs post of the day, but do you blow the fully pressurised air tank from the bottom valve to remove water from the tank before starting spraying? There could be quite a build up of water in the tank.
If you don't do this fairly frequently, you may find that the in line filter will be ineffective.
That is a shame as the paint looks nice apart from that.
I have never found the small in-line ones to be much good. I use a larger trap fitted to the outlet of the compressor which I drain regularly as well as draining the receiver as described by a previous poster. Bear in mind if the air is damp, even if you are spraying inside, there will be more water in the compressed air and draining needs to be more frequent. The cost of a decent water trap / filter is not that great compared with the cost of the paint for redoing the job again!
I have never found the small in-line ones to be much good. I use a larger trap fitted to the outlet of the compressor which I drain regularly as well as draining the receiver as described by a previous poster. Bear in mind if the air is damp, even if you are spraying inside, there will be more water in the compressed air and draining needs to be more frequent. The cost of a decent water trap / filter is not that great compared with the cost of the paint for redoing the job again!
Still not sorted unfortunately.
Lets start at the beginning (well from my last post....)
Sanded out the water marks from the back of the bonnet and door sides but due to these areas (back of the bonnet being the worst) being awkward to sand, I thought I would try and spray the fronts.
Prepared eveything to go at 9am this morning. This meant the front of both doors, the bonnet and the bootlid were awaiting 3 coats of 2k Red.
The panels had been 2k primed, sanded, tack clothed and degreased.
The compressor now has 2 filters (one large and one of the small glass one's) and I drained the tank a couple of times to make sure there was no water in it.
After the first/second coat I 'think' all was ok. Whilst applying the third coat I could already see the blisters again! This makes me think that water must be getting out of the gun 'after' the compressor has been running for a long time.
It is a 100 lire compressor so is running for 90% of the time whilst spraying.
I have therfore come to the conclusion that I am working the compressor to hard.
In the morning I am going to sand the bonnet 240 (to remove blisters), 400, 800 and then I am going to spray JUST the front of the bonnet.
If it comes out well I will know that I am expecting to much from the compressor.
Any thoughts??
.
Lets start at the beginning (well from my last post....)
Sanded out the water marks from the back of the bonnet and door sides but due to these areas (back of the bonnet being the worst) being awkward to sand, I thought I would try and spray the fronts.
Prepared eveything to go at 9am this morning. This meant the front of both doors, the bonnet and the bootlid were awaiting 3 coats of 2k Red.
The panels had been 2k primed, sanded, tack clothed and degreased.
The compressor now has 2 filters (one large and one of the small glass one's) and I drained the tank a couple of times to make sure there was no water in it.
After the first/second coat I 'think' all was ok. Whilst applying the third coat I could already see the blisters again! This makes me think that water must be getting out of the gun 'after' the compressor has been running for a long time.
It is a 100 lire compressor so is running for 90% of the time whilst spraying.
I have therfore come to the conclusion that I am working the compressor to hard.
In the morning I am going to sand the bonnet 240 (to remove blisters), 400, 800 and then I am going to spray JUST the front of the bonnet.
If it comes out well I will know that I am expecting to much from the compressor.
Any thoughts??
.
It seems an unusually quick build up of moisture ??? especially if its getting through two filters.
I have a smaller compressor than you - I run greedy air tools from it and spray. I only drain it about 4 times a year and get about a pint out each time, I only have one filter but never have any probs.
How much water did you get when you drained your comp?
Makes me think it's not water (difficult to see from the pics)
Explore other avenues of contamination
What kind of compressor is it? Is the type that has oil?
Try changing the air filter - if that's been contaminated it will draw it in.
I have a smaller compressor than you - I run greedy air tools from it and spray. I only drain it about 4 times a year and get about a pint out each time, I only have one filter but never have any probs.
How much water did you get when you drained your comp?
Makes me think it's not water (difficult to see from the pics)
Explore other avenues of contamination
What kind of compressor is it? Is the type that has oil?
Try changing the air filter - if that's been contaminated it will draw it in.
Squiggs said:
It seems an unusually quick build up of moisture ??? especially if its getting through two filters.
I have a smaller compressor than you - I run greedy air tools from it and spray. I only drain it about 4 times a year and get about a pint out each time, I only have one filter but never have any probs.
How much water did you get when you drained your comp?
Makes me think it's not water (difficult to see from the pics)
Explore other avenues of contamination
What kind of compressor is it? Is the type that has oil?
Try changing the air filter - if that's been contaminated it will draw it in.
HiI have a smaller compressor than you - I run greedy air tools from it and spray. I only drain it about 4 times a year and get about a pint out each time, I only have one filter but never have any probs.
How much water did you get when you drained your comp?
Makes me think it's not water (difficult to see from the pics)
Explore other avenues of contamination
What kind of compressor is it? Is the type that has oil?
Try changing the air filter - if that's been contaminated it will draw it in.
Brand new compressor, not an oil type.
I would say a tea spoon at max comes out. I can see water has been picked up in the water filter; only looks like a few drops.
When you say 'other' types of contamination to be honest you can physically see the water bubbles on the panels (the bigger ones anyway).
With the spraying as I said the compressor is runnig nearly all the time. Say it takes me 5 minutes to give one coat, thats 15 minutes to do three. I guess the compressor would be hot after this time.
The thing is. since the bonnet etc are such important panels even if there is just the one mark on them, that is one mark to many; it has to be right.
Cheers
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