Cascade Crew

popballz · Posted: Thu Sep 16, 2010 6:32 pm Post subject: Paint v.2

So i planned to have this car fully painted by fall, but i got distracted!

I have started though! I have 3/4ths of the dents pulled out, just have to apply a coat of bondo and it will be good.

I have a small problem with orange-peal-ish stuff..
I painted my door with epoxy primer but it is not flat, I think I just have to mess around with my settings.

it sprayed on bumpy, but where it is kind of thick, it is smooth, I think I just got scared and put the "wet" coats on too light, but I'll figure it out soon!
any suggestions welcome!

also, does length of hose effect anything? I wouldn't think so but I am using 200 feet.

more pictures later

water filter/hoses

hey, there's my distraction(s) in the background Wink

can see bumpty in this picture (camera phone!)

chevymad · Posted: Thu Sep 16, 2010 6:40 pm Post subject:

Do you have a regulator and gauge at your gun? If so the hose length doesnt matter. But if you dont spraying metallic will be a trick. The air pressure will spike and drop every time you pull or release the trigger.

PS.. use a disposable moisture trap/filter at the gun too.

aaron_sK · Posted: Thu Sep 16, 2010 6:59 pm Post subject:

I'm afraid I'm not much help when it comes to paint not coming out like crap, but is that a '54 Chebbie sitting in your garage?

flea · Posted: Thu Sep 16, 2010 7:26 pm Post subject:

http://www.finishwiz.com/orangepeel.htm

You might try a retarder in the paint. If your compressor is on the minimum side, then you might think about a shorter hose. Also try adjusting the viscosity, Thicker paint will tend to orange peel.

Play with it on test panels till it looks good. You need good viscosity, and good air pressure, and a retarder won't hurt, but its a bit of a band-aid for when you just can't make it work without chemical warfare.

chevymad · Posted: Thu Sep 16, 2010 7:38 pm Post subject:

Problem with a retarder is the opposite of orange peel.. runs! I think i'd rather deal with peel then runs.

As Flea said though, make sure your viscosity is right. Turn the material up on your gun setting and do a test spray. Or perhaps just slow your hand down so you spray it on heavier. Distance from the panel will also make a difference. Too far away and it will peel.. too close and you run. There's alot of things to try yet.

flea · Posted: Thu Sep 16, 2010 7:47 pm Post subject:

Thats kind of why I referred to it as chemical warfare.

Adjusting the viscosity is the probably the answer, but as Brandon said, if your not real careful you will run it.

Too thick=Orange peel.
Too thin=runs.

chevymad · Posted: Thu Sep 16, 2010 8:26 pm Post subject:

With the epoxy primer he may not be able to adjust viscosity.. you just mix it 50/50. No reducer or thinner.

popballz · Posted: Fri Sep 17, 2010 1:52 am Post subject:

popballz · Posted: Fri Sep 17, 2010 2:22 am Post subject:

The instructions that came with the paint said when using hvlp gun, to have 5-10 psi at cap..

what is cap? gun/regulator?

chevymad · Posted: Fri Sep 17, 2010 6:30 am Post subject:

Cap is part of the gun. You don't have any way to measure that. Unless your gun instructions have a table or something. I've found with the hvlp guns they like a much higher pressure then I expected.

91RSVert · Posted: Fri Sep 17, 2010 7:16 am Post subject:

Quick read over and I agree with most things said.

Painting is an art, and everyone does it different. The door is orange pealed yes. So you need to change something, it could be speed, distance from object, settings on the gun. All you can do is keep changing tell you figure out what works for YOU.

I would suggest staying away from large metallic paint jobs tell you get the hang of it.

blue89 · Posted: Fri Sep 17, 2010 6:05 pm Post subject:

I think I corrected my peel problem by decreasing my hose length and increasing the pressure. And if I'm not mistaken, the further away you have the water separator the better. And you can always wet sand the orange peel.

Schultzy89GTA · Posted: Fri Sep 17, 2010 7:41 pm Post subject:

I don't know jack about painting except that it costs a lot when i pay people to do it... but... what are the motorcycles there?

-Schultzy

popballz · Posted: Sat Sep 18, 2010 12:42 am Post subject:

chevymad · Posted: Sat Sep 18, 2010 7:58 am Post subject:

Actually dont remember exactly.. seems like close to 40.. See if you can get Twilightoptics attention. He used hvlp guns for his rx7.

Whiskeychick · Posted: Sun Sep 19, 2010 10:00 pm Post subject:

Know im kinda late to this, but yes the hose is important.
You need a shorter hose with a larger diameter for best results.
HVLP guns are air Hogs.

Best bet to try to cut down on air consumption is to not run a full fan on the gun your using. Turn the fan pattern all the way down, then open it back about a 1/2 turn. I use this trick for spraying primers on the floor, that way I get minimal peel but dont have as much overspray and can use less air pressure, and therefore use less air in the process.

It does look like you put your epoxy on too light from your pic though. Try putting it on a little wetter, and if your worried about runs try using a 75% overlap instead of 50%. Worse comes to worse, let it dry, block out the run and throw one more coat on it Smile

Do a little test spray on some paper, keep the gun 8" away, and pull the trigger for one quick spray. Check the outside edges of the pattern. If there are even sized drops uniformly throughout your good, if the outer edges have larger "lumpy" spots, you need more pressure.

popballz · Posted: Mon Sep 20, 2010 1:50 am Post subject:

Twilightoptics · Posted: Mon Sep 20, 2010 8:06 am Post subject:

It was something around 35at the gun regulator.

All the pros I talked to said leave the pressure valve on the bottom of the gun wide open, and control your pattern with the regulator itself.

I used 2 regulators. One off the tank set at about 110psi, and one on the gun to bring the pressire down. That kept a consistant pressure.

If you're peelin, definitely moving too fast or not enough material.