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05-21-2019, 06:08 PM
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Join Date: Nov 2018
Location: Eagan, MN
Posts: 47
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Sprayer for Priming
To prime or not to prime...that is NOT the question.
I have been using rattle can version of SEM primer thus far, however as I primed the ribs for the wing, I noticed I started going through cans quite quickly.
There is a lot of convinces and ease of use in the rattle cans, but I'm starting to consider a sprayer. I have a wagner paint sprayer which I know will now work, so considering a HVLP. I have heard a few folks mention that harbor freight has an inexpensive one.
What is everyones thought on moving up to a sprayer, vs staying with a rattle can moving forward with the wings and fuselage, and any advice on a HVLP sprayer?
Thanks
Dave
RV-7 in process
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05-21-2019, 07:08 PM
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Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,219
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In general, you'll come out cheaper buying paint/primer in bulk than using rattle cans, and you'll (likely) be using higher quality paints too.
The "purple gun" from Harbor Freight is my go-to cheap gun. Get the one with the 20 ounce cup and the regulator included. About $30 when it isn't on sale, far less when it is. I've sprayed everything from epoxy primer to high build primer to single stage to base/clear with it and it is a really good, inexpensive solution.
https://www.harborfreight.com/20-oz-...tor-62381.html
__________________
Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10
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05-21-2019, 07:20 PM
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Join Date: Jan 2007
Location: Battleground
Posts: 4,348
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The primer product you intend to use should have a paint gun orifice recommendation in their instructions. Just make sure your gun has a tip size iin that range.
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Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
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05-21-2019, 07:21 PM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,947
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HVLP
Quote:
Originally Posted by Kyle Boatright
In general, you'll come out cheaper buying paint/primer in bulk than using rattle cans, and you'll (likely) be using higher quality paints too.
The "purple gun" from Harbor Freight is my go-to cheap gun. Get the one with the 20 ounce cup and the regulator included. About $30 when it isn't on sale, far less when it is. I've sprayed everything from epoxy primer to high build primer to single stage to base/clear with it and it is a really good, inexpensive solution.
https://www.harborfreight.com/20-oz-...tor-62381.html
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Agreed. Use a 20% coupon and save even more. I would recommend a disposable cup solution like 3MPPS. Cuts down on cleaning. Gab a couple red disposable water/oil filters too. I prefer the RTI mini regulator.
__________________
Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/03/2019, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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05-21-2019, 07:56 PM
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Join Date: Jan 2010
Location: Southern Michigan
Posts: 1,966
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Quote:
Originally Posted by Kyle Boatright
In general, you'll come out cheaper buying paint/primer in bulk than using rattle cans, and you'll (likely) be using higher quality paints too.
The "purple gun" from Harbor Freight is my go-to cheap gun. Get the one with the 20 ounce cup and the regulator included. About $30 when it isn't on sale, far less when it is. I've sprayed everything from epoxy primer to high build primer to single stage to base/clear with it and it is a really good, inexpensive solution.
https://www.harborfreight.com/20-oz-...tor-62381.html
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Yep,,,good gun for this purpose. They go on sale sometimes for under $10,,,,ad the 20% coupon and your at $8. I always have a couple NIB on my shelf in case I am too lazy/tired to clean it,,,,I just throw it away and grab a new one off the shelf next time I am in need, and buy another one when on sale again. They have a new line of "professional" spray guns in their line-up that run around $100 and wonder if anyone has tried it for a finish coat. I have a DevilBiss Tekna using DeKups for finish coat but would not hesitate to try one if I didn't.
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David C.
Howell, MI
RV-10: #41686 Under Construction
RV-9A: #90949 Under Construction
RV-10: #40637 Completed/Sold 2016
Cozy MKIV:#656 Completed/Sold 2007
"Donor Exempt" but donated through Dec. 2020
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05-21-2019, 08:09 PM
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Join Date: Mar 2008
Location: Dublin, CA
Posts: 1,261
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The harbor freight gun seems to be sufficient for primer. I like the one with the regulator but the others are good as backups. These are cheap guns so they do break or the cups crack and leak. I've gone through a few during my build but they are cheap enough to not worry about it. Look for sales or coupons the price can be discounted quite a bit.
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Ray Tonks
2020 Donation Paid
Titan IOX-370, Dual PMAGs, 9.6:1 Pistons, FM-150
RV-7 Fuselage in progress
* Cabin Interior - In progress
RV-7 SB Wings
* Both Wings fully skinned
* Fuel Tanks Complete - No leaks finally
* Ailerons Complete
* Flaps Complete
RV-7 Empennage - Complete (a little fiberglass work left)
Vans Training Kit # 2 - Complete
RV-7 Preview Plans
Vans Training Kit #1 - Complete
EAA Sheet Metal Class - Complete
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05-21-2019, 10:01 PM
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Join Date: Nov 2018
Location: Eagan, MN
Posts: 47
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Thank you all, the comments were very helpful.
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05-22-2019, 04:14 AM
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Join Date: Nov 2005
Location: Asheville, NC
Posts: 2,692
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Are we talking about priming the whole exterior at once or priming the individual fabricated pieces? I can't see using the bowl of a full size gun for small parts without wasting a lot of mixed primer.
I used an air brush for 90% of the primed parts of my standard build. The bigger surfaces like tips and cowl were done with a cheap (HF ish) touch up gun, For those that don't know what a touch up gun is, it is simply a full function gun with a small supply bowl. The trigger is different too but that is not important. The small bowl is.
If I chose to paint the exterior, then I would get a full sized gun but I would still use the air brush for fabricated parts.
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Bill Pendergrass
ME/AE '82
RV-7A: Flying since April 15, 2012. 850 hrs
YIO-360-M1B, mags, CS, GRT EX and WS H1s & A/P, Navworx
Unpainted, polished....kinda'... Eyeballin' vinyl really hard.
Yeah. The boss got a Silhouette Cameo 4 Xmas 2019.
Last edited by rzbill : 05-22-2019 at 04:17 AM.
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05-22-2019, 04:34 AM
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Join Date: Aug 2014
Location: Bowie MD
Posts: 886
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With Akzo, I use a primer pistol exclusively for all my interior and a few exterior parts, tho for a full exterior in prep for a paint job, Id go with a proper HLPV gun. I have the HF purple gun but have yet to actually use it.
__________________
Mani
Busby MustangII (FoldingWing) Pending DAR.
Don't be a hater; I'm a cousin with thin wings! 
N251Y (res)
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05-22-2019, 04:54 AM
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Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,219
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Quote:
Originally Posted by rzbill
Are we talking about priming the whole exterior at once or priming the individual fabricated pieces? I can't see using the bowl of a full size gun for small parts without wasting a lot of mixed primer.
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There is little or no difference in the amount of paint wasted or cleaning time between a big gun and a little gun. In both cases, you mix slightly more paint than you think you'll need (nothing worse than running out of primer 97% through the job), spray the items, and clean up.
__________________
Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10
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