CUP GUNS & AIR PRESURE
PAINT POT SPRAYERS
A presure paint pot and air compressor are referred to as a conventional type coating application system.
A conventional paint sprayer is two pieces of equipment including a cup gun or pot and an air compressor which is used to apply coating products. If on the other-hand your looking for a different type of paint sprayer or paint spraying advice then use this
page to help you out.
A conventional spray system has all the advantages of a high volume low pressure sprayer (HVLP) without the cost.
Conventional sprayers do have there disadvantages though, over-spray and excessive use of product are a couple. By reading the text below you should be able to find the information your looking for.
WHAT ARE PRESURE PAINT POT
SPRAYERS & CUP GUNS
WHAT'S GOOD ABOUT CUP GUN & PRESURE PAINT POT SPRAYERS
Spray paint cans (or bombs) are the most popular way to apply a smooth even finish. If on the other hand you would like a little more speed and ease of use, and are on a budget, a compressor and paint gun are the best investment to make (used if possible). Spending two or three hundred dollars on a conventional system is far superior choice than purchasing a hundred and fifty dollar electric hand held power sprayer. Especially since the compressor can be used for projects other than applying coatings.
WHAT'S BAD ABOUT CUP GUN & PRESURE PAINT POT SPRAYERS
Cost may be an obstacle for some, if your doing a larger or more intricate job a brush, roller or both in most cases can always do a fine job. For smaller work or hard to reach places use a spray paint can. Another disadvantage to a conventional system is that it disburses a good amount of product into the environment when spraying. Not only is this bad for the world we live in but your material costs are that much more. A high volume low pressure spray system works best to alleviate the afore mentioned problems and have the advantage of setting fan shape and width, but tend to cost quite a bit more.
CUP GUN & PRESURE PAINT POT SPRAYERS SET UP
Make sure that any objects or areas you wish to protect from over spray have been closed off or covered prior to coating your projects. Items worked on need to be in an easy to walk around area, and high enough up when possible (use a table if needed). Your equipment and fluid lines should be exceptionally clean so as to avoid any spraying problems. A respirator that is recommended for the material your coating is a requirement. Follow all of your local government, manufacturer, safety and spraying regulations. Also be sure to check with your coating supplier as per the type of products to use for your specific project and thinning instructions prior to beginning your conventional spray paint job.
CUP GUN & PRESURE PAINT POT SPRAYERS COATINGS TO USE
Speak to your paint store sales rep regarding the type of coating and solvents to use and the best way to thin and apply the product. Most manufacturers recommend a maximum of 10% thinning for paints and 25% for other coatings. Also, keep in mind, the
material of the project your spraying may require a specific type of coating to be applied to it. It's always a good idea to do some research before beginning to spray.
SETTINGS FOR CUP GUN & PRESURE PAINT POT SPRAYERS
Fill your pot or cup gun with the recommended
thinned coating for the project your doing. Set the compressors air pressure for spraying. Start at 20 psi, (pounds per squire inch) adjust air and fluid flow up or down depending on how well the liquid is coming out of your gun. Turn the knobs at the back of the gun (bottom is usually fluid top is air). With the air knob closed adjust the fluid knob about a half a turn open, then pull the guns trigger and spray into a clean pail (re-use product if you can). The fluid stream should be about eight inches or so long before it arcs into the pail. If it does not, raise or lower the compressors pressure or gun air flow until you have a nice eight inch long steady flow. If this doesn’t happen be sure your gun and system are not plugged and pot lids, lines, hoses, and cups are air tight and not leaking. Also, readjust your coatings viscosity if needed. It may be to thick or thin for the equipment your using. Once everything looks good slowly turn the air knob open till you have a nice consistent wide fan. You can also close the air down a little if need. Use a scrap piece of wood or thick sheet of cardboard to test the spray pattern. Be sure
the ring holding the cap on the end of your gun is snug yet the cap still turns. When the wings on the cap are turned horizontal you will get a vertical spray fan. This type of fan works well for applying product from side to side. Using the vertical cap position is of course best for up and down spraying. Keep spraying with your presure paint pot system and testing while opening and closing both the air and fluid knobs. Your objective when you make a spray pass on your scrap piece is to have an eight
inch wide path of product that is consistent in coverage. Keep practicing until everything works properly.
SPRAYING WITH A CUP GUNS OR PRESURE PAINT POT SPRAYER
Start moving the gun then pull the trigger. Begin again where you started about halfway down or over depending on the direction your spraying. Overlapping each coat with half of the next will give you the best finish. If you have practiced and are happy with the way your scrap pieces look start applying product to your sanded and prepped projects. Make it as easy as possible at first. A flat door being the simplest, spindles and cabinets the hardest. Let dry, sand then apply another coat. Three applications or more (five max)are best, stop when your happy with your finish. Your first coating should be the thinnest the last the
thickest. It is better to have three thin coats then a couple thick ones.
CUPS & PRESURE PAINT POT SPRAYERS COATING PROBLEMS
Prepping is very important. Your surface must be sanded smooth and dusted with holes and scratches filled using the appropriate filler before spraying. Deviation in a coatings sheen, sags, orange pealing and runs require your product to be thicker/thinner or less/more overlapping, unplugging of equipment (e.g. hoses and gun end cap holes). Using scrap pieces that are leaning up against a wall and practicing should alleviate these problems. Also make sure to use the proper thinners as per the coatings instructions and that your spray materials, project surface, the room your in and the equipment being used are not contaminated with grease, dirt, dust moisture etc.
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