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post #1 of 8 (permalink) Old 10-28-2012, 02:38 PM Thread Starter
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Default Spraying Varnish





Hi Everyone,

Came across this wonderful website in my search for advice on spraying varnish. We are a little thick in the UK so perhaps someone out there can help me. I took delivery of a Bosch PFS 105E spraying system. On reading the manual it states that the gun is not advisable for use spraying Varnish. Gosh, that's what I wanted it for, and having read of people spraying varnish on furniture, I believed it was just the tackle for me. I even bought an extra fine spray gun suitable for the 105E but am now not sure if it is a special gun or just another spare part. Now I sit looking at it all and wondering if I should return it to Amazon or give it a go. I bought water based varnish and can't see why, when diluted, it won't spray. If it sprays paint, surely it will spray diluted varnish, water based at that???

So if anyone has had the same experience, please tell me what to do....should I send it back and look further at spraying equipment which will spray varnish, or am I missing something which I don't know, but you guys out there might. Any advise you can give me would be greatly appreciated and I thank you all in advance.

I'm a new member and look forward to hearing from someone soon.

Regards to you all

Mike (Webwizzkid)
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post #2 of 8 (permalink) Old 10-28-2012, 04:23 PM
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Welcome to the forum, Mike.

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I don't profess to know everything, and I may learn something new.

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post #3 of 8 (permalink) Old 10-28-2012, 04:31 PM
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Welcome, The only thing like that I have sprayed was polyurethane in a can, I guess the reason the manufacturer said not for varnish is because it may gum up in the nozzle, not really sure but just guessing

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post #4 of 8 (permalink) Old 10-29-2012, 02:03 AM
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Hi, Mike; welcome!
There was a similar question here a couple of weeks ago. Maybe the regulars who posted the very informative answers can reacall?
Basically, if you're using a compressor type air spray, it does require a lot of air.
If it's a HVLP system ( I didn't chase down your supplied cat. #) I'm also baffled.
When you say "varnish", do you mean polyurethane? What kind of spray system is dumped on the market unable to do what it should ostensibly be designed for?
Having said that, have you tried getting info from Bosch? I love their stuff...can't believe there's not a simple explanation to this.
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post #5 of 8 (permalink) Old 10-29-2012, 02:09 AM
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Fine-spray systems from Bosch - YouTube
In the opening spiel the talking head very specifically mentions "varnish" and "systems" (plural). I'm wondering if you need one of the other models?
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post #6 of 8 (permalink) Old 10-29-2012, 06:23 AM Thread Starter
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Quote:
Originally Posted by DaninVan View Post
Hi, Mike; welcome!
There was a similar question here a couple of weeks ago. Maybe the regulars who posted the very informative answers can reacall?
Basically, if you're using a compressor type air spray, it does require a lot of air.
If it's a HVLP system ( I didn't chase down your supplied cat. #) I'm also baffled.
When you say "varnish", do you mean polyurethane? What kind of spray system is dumped on the market unable to do what it should ostensibly be designed for?
Having said that, have you tried getting info from Bosch? I love their stuff...can't believe there's not a simple explanation to this.
Hi

Yes it is a Bosch PFS 105E HVLP system. I will write soon to Bosch but I guess they don't want varnish clogging up the gun. I think it would be o.k. when diluted correctly. Anyway the more I look into this the more I am swinging to Lacquer. Nitrocellulose based but now I'm not sure if the Bosch which has some type of plastic canister will hold nitro, maybe the bottom would melt away - anyone know about this. Varnish as you say is polyurethene or here we can get water based varnish. So whilst loving Bosch I am still not sure if I dare use this sprayer, it looks so good, but looks aren't everything!
Will keep you all informed and hope for more help.
Regards
Mike UK
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post #7 of 8 (permalink) Old 10-29-2012, 06:28 AM
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Default Spraying Varnish

Mike,
Theat Bosch will not spray OIL based varnishes but will, as you suspect, spray water based varnishes.
Try buying a water based varnish that is made for spraying, then you won't have to thin it at all. In the US I use a product called Enduro, in a red ca , that's ideal out of the can.
It's made by General Finishes, so look up their web site to see if they distribute in the UK. If not you'll find their site informative, anyway.
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post #8 of 8 (permalink) Old 10-29-2012, 06:33 AM
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You can spray anything as long as the viscosity is correct, that is, make sure that your material is not to thick for the nozzle you are using and add some thinner if it is to thick, every different type of material uses its own thinner, some use turps and some use thinners and some use water, so what ever it says that you can wash up with will also be the thinner, just adjust the air pressure down if it looks to be coming out faster than it will lay down nicely and don't try to spray your finished item until you have practiced on some worthless off-cuts until you are sure that you have understood what you are doing, and don't forget this final advice as many a good spray gun has been sent to the dump by persons who did not do this, after you are finished spraying then wash out your spray gear and flush out the pot and the gun thoroughly by spraying the appropriate thinner through the spray gun, make sure that the guns jets are cleaned as it can be impossible to get it out if you let it dry in the gun, and don't forget that working with wood is fun. NGM
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