Spraying Automotive Clear?
65 replies to this topic
Posted 14 July 2011 - 08:49 PM
What is the best airbrush to use for automotive clear coat? I have been using a Harbor Freight .5 siphon feed but not really pleased with the way it sprays the clear. I thought about going to a full size sprayer, but I would waste a ton of clear.
Posted 14 July 2011 - 09:51 PM
What is it you don't like about the Harbor Freight airbrush Pat? I was thinking of getting one to use just for spraying auto clear. Can you purchase different size nozzles and needles for the HF brush?
I've only sprayed a few baits and have used 2 different brushes. One was a Paasche VL with their #3 tip in it and it seemed to do OK. (have no idea how Paasche sizes their nozzles or what their #3 is comparable to---seems fairly large though) Also sprayed it in an Air Pro Tools airbrush (cheap Iwata knock-off) with a .2mm tip in it. The auto clear seemed like it was trying to set up in the smaller tip before I was finished. It actually quit spraying once, but by backing the needle out I was able to clear the nozzle and it started spraying again. The fact that it tried to clog worried me as I was only clearing 2 baits. The .2mm nozzle might be a tad small to spray the auto clear.
Glad you posted this as I'm anxious to see what some of the more knowledgeable guys have to say.
Edited by RayburnGuy, 14 July 2011 - 09:52 PM.
Posted 14 July 2011 - 10:25 PM
Thanks for the reply BEN!! The siphon feed just shoots out a small fine line of the clear with the air pressure turned up to 45 psi. I was hoping to know of an airbrush that will spray it out in a wider pattern. I thought about trying one of my iwatas, but thought I would ask for some advice on here first.
Posted 14 July 2011 - 10:44 PM
The HF brush I got has three different needle sizes with it, .2 , .3, and a .5 all came with the brush. It was two years ago when I purchased the airbrush, dont really know what all types of airbrushes they have in stock now.
My neighbor got me started on the auto clear. He restores old muscle cars and asked me to customize a few tags for him and he showed me everything I needed to know about spraying the clear, but knows nothing about airbrushes. I use a full size sprayer on the tags and it goes on great. A full size sprayer is a bit too much for baits though. I am just thinking that a gravity feed will spray the clear on better than the siphon feed.
Posted 15 July 2011 - 07:34 AM
hi. we use paasche h brush. 50lbs pressure. works well for baits. if you need a larger spray pattern. go to a binks touch up gun.
Posted 15 July 2011 - 08:08 AM
I've only been using around 20 psi to spray the auto clear since the viscosity is so low. So far the baits that have been sprayed using the lower pressure have turned out great. Should I be using more pressure?
Posted 15 July 2011 - 11:42 AM
Glad to see this topic raised. Been thinking of trying auto clear myself and was wondering about the best AB to use.
For those who have already sprayed auto clear ... what is best to spray through the AB to clean it? Lacquer Thinner ?
Also, are you using a 2-part clear or one that is ready to shoot out the can?
Posted 15 July 2011 - 02:40 PM
I've just recently started using auto clear so there may be better ways than what I'm doing. The auto clear I have is a 2 part clear that is mixed at a ratio of 4 to 1. Been cleaning my brushes with acetone and it seems to be working fine so far.
Posted 15 July 2011 - 03:18 PM
A detail gun would be a much better choice
for auto clear than an airbrush.
Check Harbor Freight, $12.99
Posted 15 July 2011 - 05:29 PM
The airbrush is fine, but a medium sized tip might be best. The key is to use a gravity feed brush so you are not spraying so much air, which dries the material in the tip.
Are you spraying this stuff in an open area, with lots of fresh air, and wearing a chemical mask? That stuff is pretty dangerous.
Posted 15 July 2011 - 07:11 PM
You can shoot auto clear thru a large tipped airbrush, but its not really the optimal way to it.....I've cleared lots of stuff over the years and while I have shot clear on several items with an airbrush (including crankbaits) I find its much easier, quicker and I seem to get a better finish when I use a bigger gun like a touchup gun or my preference, a gravity feed mini hvlp gun.....I've got one from Astro that is a Sata minijet knockoff and it works great for shooting clear on small items. Those smaller guns are perfect for work like this....Lures are just too small to ever need a full sized spraygun when clearing and sometimes an airbrush isn't quite big enough....Mini guns fit the bill.
Posted 15 July 2011 - 08:28 PM
Thanks guys for all of the replies!!
Thanks 68kingfisher!!! Do you have a link with gravity feed hlvp gun that you are refering to? I just want to make sure that I purchase the right one, so that I dont have to go purchase another. I sure appreciate all you guys that know what type of airbrushes to use with the auto clear!!
Posted 15 July 2011 - 08:32 PM
Yep, spraying outside with an organic vapor respirator. Been using right at 20 psi to spray with. Could probably turn that down even more as thin as the auto clear is.
Will have to check out the Astro mini gun.
Posted 15 July 2011 - 08:39 PM
I spray it in a well ventilated area with fans blowing it out the door as I am spraying it. I wear a 3m chemical mask while spraying also. Its a must to use the auto clear on the tags, because the epoxy will yellow pretty quick on tags, that goes on the front of cars. I have read a ton of good things about using it on baits for a clear. Since I already have the clear for the custom tags, I want to be able to use it on baits also.
Thanks again guys!!
Posted 15 July 2011 - 09:02 PM
What is the best nozzle size on the mini guns for the clear?
Edited by Big Bass Man, 15 July 2011 - 09:07 PM.
Posted 15 July 2011 - 10:38 PM
As is typical with anything I purchase, my Astro mini gun is no longer produced....but I found what appears to be an equally nice little hvlp mini gun for a decent price from Harbor Freight.....theres even a nice little video showing the gun in action so you can see the spray pattern before ya buy....check it out. http://www.harborfre...-gun-46719.html
My Astro has a 1.2 nozzle size and I find it works well for anything smaller then a motorcycle tank....Once I paint something bigger then a bike tank, I'll switch to a full size gun.
Posted 16 July 2011 - 01:53 AM
I just read some reviews on the HF HVLP brushes......what i read was not good...... the reviews were not on the HF site.....just thought i would pass this a long....
Posted 16 July 2011 - 06:11 AM
What type of clear are you guys using? I take it there must be a one part that air cures?
Posted 16 July 2011 - 06:46 AM
For what is worth. My norm has been 14" wood baits. I have been spraying Excel or Wham Bam, both automotive 2part clears. When doing 40 to 50 at a time I spray with an auto touch up gun,HVLP. if it's a few, I use my Badger anthem. They have a tapered needle no size.For my application it comes down to the right amount of reducer being used.
The 4 second drip test is a good rule for any mix, clear coats can be over reduced with excellent results.
Coverage is best obtained with a wider spray pattern , 75 percent overlap and a wet look to the clear.
Depending on the need , pressure goes from 15 to 35 psi.
Just started making smaller baits this year and had to get the anthem fine needle setup, works well. hot walleye black7.jpg 17.25KB 92 downloads
Posted 16 July 2011 - 09:55 AM
I only spray a few baits at a time so I think I'm going to stick with using my Paasche VL with their mid-size #3 tip. It's been doing a good job as far as I can tell. No clogging issues, pretty simple to tear apart for cleaning and has a good spray pattern.