spray gun

[goldigger]

Can anyone recommend a reasonably priced spray gun, would it be worth buying a 2nd hand one off evilbay ?
Nige

[Ford34/2]

Air supply is crucial, constant and clean, together with Filters and regulators. There are hundreds of guns under £15 these days even langy recomended them. Ideal for small touch ups, smaller area coverage, not quite up to whole car spray jobs. Something with a bigger cup might well be better. My favorite is still Devilbiss JGA syle of gun, suction action and I`ve done hundreds of cars with them, next best is an old Aerograph and Devilbiss gun gravity fed, again ancient, always cleaned scrupulously and serviced. You will achive excellent results from a cheap gun. I have an under £15 one!!! But if you have never ever sprayed before, then professional results wont be acheived on your first try, get an old door or a wing, practice laying paint on, preparing it, lay some more paint, practice on the flat and vertical,when you can achive a satisfactory result, consider spraying something important. So many things influence spraying, paint, thinners, air supply, temperature, technique are but a few.
PARAMONT is awareness of HSE recomendations, the air you breath and ventilation.

Stan

[goldigger]

Thanks for the info Stan, there seems to be a lot of difference price-wise, I've got a 200ltr compressor so air supply shouldn't be a problem, and obviously I will be wearing protective gear plus the best mask I can afford. I was wondering what is the best nozzle size, there seems to be 1.3mm - 1.8mm and I assume the hvlp guns are for primer?
I'm quite in the dark about these points so a bit of guidance would be appreciated. Another point I need clarifying is what's the best primer to use, I remember Langy used to suggest 2
pack but are there any restrictions for it's use?
Nige

[Blackpopracing]

HVLP = High Volume, Low Pressure. Best guns for modern paint techniques.

1.8 tip = primer.
1.6 tip = topcoat for big areas/large spray fan
1.3/1.2/1.1 tip for touch in or small spray areas.

JGA guns were the Rolls Royce, but are old school now. Top gun now would be a DeVilbiss GTI gravity fed (used less paint and less wastage).

HVLP, I am touching in some damage on the pop - I'm painting at just over 20 psi and there is almost no overspary in the air - just not possible with the older style guns.

Some very nice guns for little money on eBay, I'll try to sort a link out for you.

Primer - there is only one worth having - Lechlar epoxy primer. It uses its own hardener and thinners - I'll post the product codes later for you.

[Ford34/2]

Langys paint technique

Same process for steel, aluminium or GRP

Key the surface with 120 grit
apply 2 coats of epoxy primer
key the epoxy when dry with 120 grit
now do the filler work
recoat with epoxy 2 coats, wait 1 hour and then apply 3 coats of hi build wet on wet.
block sand the hi build to 600 grit dry
then apply 1-2 coats of epoxy tinted to the final topcoat colour and sand wet to 600 for straight paint or 800 for Clear Over Base.

How many coates??
Depends on what topcoat really, straight paint 3 coats, Metalflake, Kandies or graphics etc etc need more
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New fibre glass preparation.-

Bare gel coat needs keying with 150 - 180 and priming with Epoxy primer or equivalent etch if you want it to last
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from a customer::::On my bike i used to flat the filler 120 on a DA then down to 400 by hand then 800 and then 1200 wet
then prime it, flat with 1200 dry, prime and flat and then a fine topcoat and then a couple more, flat with 1200 wet and then a couple more



Way too smooth for primer, you just wasted your time and I wouldn't be surprised if the primer lifts at some point, also you don't sand primer wet, well done !!!

Lechler paint.


Lechlar is the best, also all my friends that are high end painters use the same. If you can't find a dealer Paints4U on the net sell it.
Be aware that you need to use the correct hardener/thinner with it, 29107 is the primer, 29370 or 29371 is the hardener, 00516 EPODUR is the thinner.

[Blackpopracing]

^^^
Correct, those are the product codes I was going to post.
These guns are fairly good for very little money, I think they are the same as the ones I use - I also have 2 Devilbiss JGA 558 guns - lovely expensive guns but big & heavy. These cheap guns actually give as good a finish even though they cost so little. A word of warning - strip & clean the guns before use as the manufacturers use silicone grease in them which ruins your paint.

Touch in gun; small tip and also small paint cup. Very light & easy to use.

http://www.ebay.co.uk/itm/Mini-HVLP-gravity-feed-spray-gun-0-8mm-nozzle-AT811-/142204225675?epid=1052131928&hash=item211c08488b:g:umoAAOSw0TxZY5Xn

(http://www.ebay.co.uk/itm/Mini-HVLP-gravity-feed-spray-gun-0-8mm-nozzle-AT811-/142204225675?epid=1052131928&hash=item211c08488b:g:umoAAOSw0TxZY5Xn)

[Blackpopracing]

Bigger gun, larger tip for bigger panels and larger paint cup. Still a comfy gun but you may need to file the edge of the handle grip to suit your hand for comfort.

http://www.ebay.co.uk/itm/HVLP-Gravity-Feed-Spray-Gun-0-6-Litre-Paint-Container-1-4mm-Material-Nozzle-/191958654190?epid=820024072&hash=item2cb1a09cee:g:TakAAOSwdIFXxrsg

[Blackpopracing]

If you prefer to spend more the DeVilbiss GTI, Iwata or Sata guns are all very good makes. It's not always just how well they throw paint at the panel, its also build quality, good gun balance and comfort. It's surprising how uncomfortable a gun can get very quickly when you have half a litre of paint in it if its not a good shape for your hand with nice smooth edges.

[Brizey]

I use `Metalflake` in Chessington, Surrey for all my paint needs, mainly Lechler. This company is actually the old `Calbrook Cars` that gained so much fame in the `60s - `70s...

http://www.metalflake.co.uk/