'Ere....... you forgot to tell him he will need a pressure reducer for the air supply to the gun.
Well........some tips from another amateur.
1- Buying a top of the range spray gun will not give you any better finish than you will get with a cheap one.
2-Make sure the thinners you use is suitable for the paint you are going to spray. Try some of the thinners on the surface you are going to paint. If it goes all wrinkly or swells up........use something else
3-Use a primer that is compatible with the top coats you are going to use...unless you like wrinkly paint.
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4- Make sure the surface to be painted is well rubbed down, dry and dust free. (Unless you are spraying in the garden...... then it don't make a lot of difference).
5- Connect up yer pressure reducer to the airline and then connect your splatter gun to it. Check to see that the air comes through it ok and the little nozzles in the side of the spray jet have air coming out of them. (If you put your tongue in between the flanges of the spray nozzle you can easily detect the airflow and amuse bystanders by blowing up your cheeks):rofl:
6- When the air is going through the gun (Blowing air) set up the reducer to give a pressure of about 40 psi (If you are old like me) or set it to about 3 bar if you are a young smart ar*e.
7- Now this bit is really important if you are ready to spray........... you will need to put some paint in the spray gun. :-D First mix some with thinners. About 50/50 and give it a good stir (Pick the skin out first :-D ) Dip a flat blade screwdriver in the paint and pull it out. If the paint almost disappears from the corners of the blade; its just about right. It needs to be similar in consistency to milk. Half fill the spray gun with the paint mix. (That's because if you fill it right to the top, this will be the time you discover that the top isn't screwed on properly, or the jet is blocked and the container breather is pointing in your direction )
8- You will now need a surface to experiment on. On the back of most spray guns is a twiddly knob. This one controls the paint volume and needle travel. On the side of the gun next to the splat...... er sorry spray jet is another twiddly knob. This one flattens the paint spray pattern from a cone to a flat fan shape. Ideally you are looking for a spray pattern about eight inches high.
9- At this point make sure you are wearing a face mask unless you like coloured bogies or your nostril hair all stuck together. :-D Try spraying the dustbin or next doors fence before you tackle your pride and joy. Initially all you are trying to do is get a controllable amount of paint to come out of the gun. Hold the spray gun about nine inches away from the surface you are trying to spray. The trigger on the gun should be pulled on the move just before you move on to the area to be painted and shut off just after you go off the other end of the panel. Never pull the trigger when the gun is pointing at the work because the first burst of air from the gun will be at a somewhat higher pressure and will blast a dollop of paint causing a 'run'.
(I won't explain what "runs" are .....you will find out for yourself ) Move the gun fairly swiftly across the panel and overlap the spray pattern to give even coverage. What you are looking for is sufficient paint applied for it to "Flood out' or go shiny a second or two after the gun has passed by.
If you need to cut down the amount of paint, either move faster with the gun or screw the paint adjuster screw in a little.
If the gun appears to splatter a bit ie large drops of wet paint, try thinning it a little more or try increasing the pressure a gnats.
10- If you feel you are ready to tackle the real thing and your surface is properly prepared.........give it a go. Your first coat wants to be a "Mist" coat. Don't put too much paint on the first coat, just enough to show the colour. (Semi transparent) When the paint is tacky and doesn't feel wet to the touch (Not like that you Wally........... on the edge........not in the middle of the panel..............now look, you've got a bloo*y great finger print in it......Ooooooooh give me strength. ) When the paint is touch dry, apply a thicker coat to give even coverage. Again when almost dry, you can apply another coat. For the last coat, leave it a lot longer to dry , or else the paint being applied will "Melt" the previous coats and cause runs. (These you should have discovered already)
11- Go and fetch the wife and tell her how clever you are. On the way; check that 'drift' from the paint spray hasn't gone all over her washing, and that the neighbours car hasn't got a tint on one side. :shake: If it has, remove all evidence of any spray activity and put the empty paint cans in the neighbours garden on the other side of you.
Always wash and flush your spraygun after use and store it with some clean thinners in it.
If like me you use enamel paints (The stuff you get from tractor dealers) try using petrol as a thinning agent. It works very well but it's best not to smoke while you are doing it.
If you get a bad run in the paint :cry: and it's important that the finish is perfect; stop spraying, leave it for a few days and rub it down then. DO NOT try and rectify it at the time of spraying.
If spraying outside, make sure the breeze doesn't blow overspray towards anything important or expensive.
If a fly lands on your wet paint :argh: (Which they will) and refuses to die, try gently blowing it off with an airline. If the bas*ard wont come off and wont die spray over the little bu**er until it does. Small flies rub down quite well and often only leave marks where their legs were. Big flies spiders and butterflies have a different technique which we will deal with in next weeks lesson.
DO NOT use open gas fires to heat your garage or dry a panel. I've had a serious wing fire once before. :shake:
DON'T breathe paint fumes for too long if you don't have no breathing apparatus (If you use petrol as thinners in an enclosed space, you will feel totally rat ar*ed after about ten minutes, and probably die in about fifteen. Best spray in the open if you can or a well ventilated area.) BEWARE SOME PAINT THINNERS EFFECTS ARE ACCUMULATIVE AND CAN CAUSE HARM IN THE LONG TERM IN THE FORM OF LUNG DAMAGE AND SENSITIVITY TO THE AGENTS IN THE PAINT.
Make sure the paint is warm before spraying as it will apply better. Try and warm up the panels before spraying as the paint will "Go off" quicker. Too hot and you will get an "Orange peel" effect.
If the paint won't come out of the nozzle, DO NOT point it towards you and look into the nozzle while pulling the trigger. Doing this will immediately rectify the blockage. :argh:
I hope this description is of some use to you. While it is a lighthearted look at spraying....... it works for me. No one has ever taught me how to spray and I have had some almost perfect finishes on car panels and motorcycles.
I, OR THE FORUM, ACCEPT NO RESPONSIBILITY FOR ANY ACTS OF STUPIDITY YOU MAY COMMIT WHILE SPRAYING, RUNS ON THE PANELS, OVERSPRAY ON NEXTDOORS PORSCHE OR BREACHES OF HEALTH AND SAFETY REGULATIONS.