Build a spray booth?

QUOTE: Originally posted by styrene limd21 I just have one question out of my own curiosity: How did you know that the methanol mixture didn't flash/ignite/burn since the flame would be invisible?

QUOTE: Originally posted by styrene While acrylics can be water-based, their carrier solvents such as the alcohols, are quite flammable. [snip] OK, rant's over. Feel free to flame away...... Gip Winecoff Um, that was a pun right? Just out of curiousity, when the fumes cause flames, what are we taking about here, a Hollywood-grade explosion? Or can you get away with an extinquisher nearby? Reply Edit styrene Member since May 2003 From: The flat lands of the Southeast Posted by styrene on Monday, February 2, 2004 7:03 AM QUOTE: For acrylic (water based) paints, flammability concerns with the fan motor are a non-issue That's not completely true. While acrylics can be water-based, their carrier solvents such as the alcohols, are quite flammable. In addition, if when thinning acrylics, you use isopropyl or methyl alcohol-based products, flammability does indeed become an issue. Granted, the amount sprayed, the duration of the spray, and the booth's ability (through airflow volume) to dilute solvent concentrations all factor into the risk, and reinforce the necessity of setting up a safe system, especially in your own home. While there have been no significant reports of problems (seems like there was one not too long ago), doesn't mean that some "unlucky" person isn't going to be the one to roll snake-eyes at some point in time. Just a kinda crazy question, but will your homeowner's or renter's insurance cover a fire resulting from an inadequately built and installed piece of equipment? Seems to me that if anyone is going to the trouble to build a spray booth, it ought to be done right. Maybe water-based acrylics are what's used now, but what about when it's time to spray that nice lacquer-based metallizer, or maybe that nice acrylic lacquer clear coat everyone is foaming at the mouth over. It could be that spraying for 5 minutes on a 1/72 scale aircraft could change quickly when it's time to paint that nice 1/350 or 1/196 scale ship that you've wanted to sink your teeth into; now you're spraying for about 30-40 minutes at a sitting. Risk increase? Absolutely. All I'm saying is that conditions change, and as they do, the booth should be able to just about handle them all and do it both safely AND efficiently. Maybe I'm over-reacting, but I've seen the downsides to cutting corners to save a buck or an hour, and I don't want anything to happen to anyone in my forum family. OK, rant's over. Feel free to flame away...... Gip Winecoff 1882: "God is dead"--F. Nietzsche 1900: "Nietzsche is dead"--God Reply MikeV Member since April 2003 From: Hayward, CA Posted by MikeV on Saturday, January 31, 2004 11:48 PM QUOTE: Originally posted by limd21 Cardboard box, 20" window fan, pleated paper furnace filter, duct tape. Paint interior white if you want to get fancy. Install lights if you want to get really fancy. After shooting several models, I see no evidence of paint spray making it past the filter onto the fan. Fan is a three-speed model, the lowest setting seems perfect. For acrylic (water based) paints, flammability concerns with the fan motor are a non-issue. When done, the whole thing stores away neatly (I leave the fan taped to the box). The fan's little plastic handle can carry the whole thing with no trouble so storage is trivial. That's a good setup there for water based acrylics. I may do the same thing. Mike “Wisdom is the right use of knowledge. To know is not to be wise. Many men know a great deal, and are all the greater fools for it. There is no fool so great a fool as a knowing fool. But to know how to use knowledge is to have wisdom. " Charles Spurgeon Reply Anonymous Member since November 2005 Posted by Anonymous on Saturday, January 31, 2004 11:24 PM I built my spray paint booth from an old fish aqarium I got from a thrift store for 5 bucks,,it had a cracked glass which I removed anyways and have the opening point out a window. It still has the light which aids in painting. It cleans overspray easy with paint remover from tthe glass PS be sure you get the glass and not plastic tank also there are many sizes I got a 20 gallon tank since I do mostly 1/72 scale aircraft Reply Edit Kumy Member since December 2002 From: Steeler Country Posted by Kumy on Thursday, January 29, 2004 7:11 PM I've been casually researchin this too. I'd like to build one. The wood wouldn't be hard. A light wouldn't be bad. My 2 biggest decisions would be whether to make it a freestanding type unit vented OR to make a window type unit with a fan blower out the back. I think I could do the wiring. You can pick up some melamine board and some masonite board to make up the box. Home Depot or Lowes would have all the wood you'd want. And they will cut it down for you if you can't haul a 4 x 8 sheet in your car Stick a little lazy susan in the bottom or make something with a dowel rod and plywood. I keep reading that Graingers will sell to the public.... they never used to when I stopped in but that was awhile back. Maybe they will now or I could buy a fan thru the company I work for. If I do finally get it sorted out I'll try to draw some construction drawings on CAD... unless its a total mess then forget what I just said..... Reply Anonymous Member since November 2005 Posted by Anonymous on Wednesday, January 28, 2004 3:03 PM Thanks to everyone for their input. Mark Reply Edit Anonymous Member since November 2005 Posted by Anonymous on Wednesday, January 28, 2004 12:05 PM Use some fireproof paint on the wood!!!! Reply Edit Anonymous Member since November 2005 Posted by Anonymous on Wednesday, January 28, 2004 11:59 AM I once made a spray booth out of an old cardboard box,with a hole cut in it for the fan.I used a exhaust fan someone gave to me,I forget what its origional use was for though,and a piece of duct like you would use for the exhaust of a dryer or something.A piece of wood with a hole(for the exhaust duct)goes between the window and windowsill. it wasnt the prettiest but it took a few minutes to make...I was also able to crush it up and throw it away when it got too old. So youd propably be better off making one out of a better material but you can try cardboard to make a test version of it.then use wood to make a more quality version when you find the design you like. Reply Edit Anonymous Member since November 2005 Posted by Anonymous on Wednesday, January 28, 2004 11:57 AM Cardboard box, 20" window fan, pleated paper furnace filter, duct tape. Paint interior white if you want to get fancy. Install lights if you want to get really fancy. After shooting several models, I see no evidence of paint spray making it past the filter onto the fan. Fan is a three-speed model, the lowest setting seems perfect. For acrylic (water based) paints, flammability concerns with the fan motor are a non-issue. When done, the whole thing stores away neatly (I leave the fan taped to the box). The fan's little plastic handle can carry the whole thing with no trouble so storage is trivial. Reply Edit Anonymous Member since November 2005 Posted by Anonymous on Wednesday, January 28, 2004 11:25 AM One of my favorite sayings "Do as THEY say, not as I do." I tried following Naplak's design: http://www.naplak.com/modeling/tips/painting_hood.htm Except, I was never able to find the particle board box. So, erring on the side of stupidity, I built one out of a cardboard box. It works like a charm. (well perhaps a very ugly brown charm with "large eggs" written on it) I do not paint a lot, so nothing has exploded or caught fire .. yet... Search around here for paint booth, you will find endless discussions on the subject. Reply Edit styrene Member since May 2003 From: The flat lands of the Southeast Posted by styrene on Wednesday, January 28, 2004 6:03 AM Spray booths should not be constructed of plain wood and range hoods. The whole purpose of a booth is to remove concentrations of organic vapors and paint residues while reducing the potential for fire/explosion. Booth walls should be constructed of fire proof or fire resistant materials, and fans should at least be of the brushless variety. The link that MikeV posted is excellent and helps you determine the cfm requirements of your fan based on the size of the booth you are construcing. Just one thing to keep in mind is that once all the research is done, you might find it ulitimately more economical to buy a booth from a reputable manufacturer. Just a thought... Gip Winecoff 1882: "God is dead"--F. Nietzsche 1900: "Nietzsche is dead"--God Reply mark956 Member since February 2003 From: USA Posted by mark956 on Tuesday, January 27, 2004 8:48 PM The link Mike posted is good. If you have FSM issue from September 2002. Look in the Scale talk section in the front of the magizine. There is a picture from Chris Mcbain. He says he built one for $20.00 using a old oven range hood and some left over lumber and a lazy susan. I hope this helps and good luck. mark956 Reply MikeV Member since April 2003 From: Hayward, CA Posted by MikeV on Tuesday, January 27, 2004 8:36 PM Mark, I haven't built one but this link gives you all the information you will need. http://modelpaint.tripod.com/booth2.htm Mike “Wisdom is the right use of knowledge. To know is not to be wise. Many men know a great deal, and are all the greater fools for it. There is no fool so great a fool as a knowing fool. But to know how to use knowledge is to have wisdom. " Charles Spurgeon Reply Anonymous Member since November 2005 Build a spray booth? Posted by Anonymous on Tuesday, January 27, 2004 6:37 PM Hi everyone: I originally posted this under tools and then found out it was the wrong place. I want to build a spray booth and would appreciate any and all input from those of you who have built one. All input would be greatly appreciated. Thanks, Mark Reply Edit JOIN OUR COMMUNITY! Our community is FREE to join. To participate you must either login or register for an account. Login Register SEARCH FORUMS FREE NEWSLETTER SIGN UP By signing up you may also receive reader surveys and occasional special offers. We do not sell, rent or trade our email lists. View our Privacy Policy. 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