VAF Forums

VAF Forums (https://vansairforce.net/community/index.php)
-   RV Building Tips/Techniques (https://vansairforce.net/community/forumdisplay.php?f=74)
-   -   Sprayer for Priming (https://vansairforce.net/community/showthread.php?t=171732)

Dave S 05-21-2019 06:08 PM

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

Kyle Boatright 05-21-2019 07:08 PM

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

JonJay 05-21-2019 07:20 PM

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.

wirejock 05-21-2019 07:21 PM

HVLP
 
Quote:

Originally Posted by Kyle Boatright (Post 1347996)
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

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.

9GT 05-21-2019 07:56 PM

Quote:

Originally Posted by Kyle Boatright (Post 1347996)
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

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.

rapid_ascent 05-21-2019 08:09 PM

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.

Dave S 05-21-2019 10:01 PM

Thank you all, the comments were very helpful.

rzbill 05-22-2019 04:14 AM

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.

maniago 05-22-2019 04:34 AM

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.

Kyle Boatright 05-22-2019 04:54 AM

Quote:

Originally Posted by rzbill (Post 1348052)
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.
.

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.


All times are GMT -6. The time now is 03:49 AM.