MGExp

MGB & GT Forum

Spraying primer question - paint gun limitations

. Become a Supporting Member to hide the ad above & support a small business
AutoShrine Sponsor
AutoShrine Sponsor
AutoShrine Sponsor
AutoShrine Sponsor
AutoShrine Sponsor
sdyck Avatar
sdyck Steve Dyck
Calgary, AB, Canada   CAN
Sign in to contact
1970 MG MGB
Question For all you painters out there;

I bought a LVLP spray gun for painting, one that will run with may mid size compressor.

It comes only with a 1.4mm tip. When I look at most guns recommended for primer the tip is 1.8mm Can I spray all primers with the 1.4mm tip or are there some that have too many solids (ie high build) and wouldn't flow properly?

Thanks



Steve D

'70B - current

Was this post helpful or interesting?
Yes No Thank
. Become a Supporting Member to hide the ad above & support a small business
B-racer Avatar
B-racer Jeff Schlemmer
Shakopee, MN, USA   USA
Sign in to contact
You may have issues with thin coats and too fast of a dry time. You will need to thin the primer about 25% more to use the 1.4mm tip, but you should get a nice smooth finish!!! Another option is to go but the cheapest ($30) spray gun you can find for the primer. I have a generic harware store gun that I use for primer and a Sata for the top coats.

Was this post helpful or interesting?
Yes No Thank
dennis70 Avatar
dennis70 Dennis Diiorio
Schenectady, upstate NY, USA   USA
Sign in to contact
I agree get another gun for the primer, and save the good one for the color coat. By the way I have the same hood support, Moss # 3333321, works great until I try to close the garage overhead door. Dennis70

Was this post helpful or interesting?
Yes No Thank
sdyck Avatar
sdyck Steve Dyck
Calgary, AB, Canada   CAN
Sign in to contact
1970 MG MGB
Hey dennis I've been beat up for using that inferiour part. As a good Canadian I should be using a good Canadian OEM hood support such as this one.



Steve D

'70B - current


Attachments:
hockeymonkey_1929_13657275.gif    2.9 KB
hockeymonkey_1929_13657275.gif

Was this post helpful or interesting?
Yes No Thank
. Become a Supporting Member to hide the ad above & support a small business
dennis70 Avatar
dennis70 Dennis Diiorio
Schenectady, upstate NY, USA   USA
Sign in to contact
Thats funny, good luck

Was this post helpful or interesting?
Yes No Thank
Ryan Reis Avatar
Beatrice, NE, USA   USA
Sign in to contact
1968 MG MGB
I've sprayed Omni high build primer with a hvlp gravity feed gun with a 1.5 tip. Worked fine.



Ryan

Was this post helpful or interesting?
Yes No Thank
Jim1971 Jim Smith
Ladysmith, BC, Canada   CAN
Sign in to contact
Most manufacturers of primers, finishes tell you which tip and what pressure to use.
The big thing is to clean the gun properly. I leave a bit of lacquer thinner in the gun and remove the nozzle and put it in the gun.
A good gun that you can buy maintenance parts for is worth the extra. Different sizes of tips can be bought. The DeVilbiss HVLP gun that I have was worth the extra.
A PA HVLP is used for primer. The DeVilbiss is used for finish work.

The lower cost HVLP needs to held much closer to the surface. This means that the overlap is harder to get correct.
The DeVilbiss is held 9" to 12” away and gives a consistent 10" t0 12" pattern and flow. This makes it easier to get the finish to flow on even. With the good gun you can see the finish flowing. The PA HVLP is much harder to use.




Jim...Nanaimo, BC
1971 MGB collector
1975 MGB driver
1975 MGB in pieces waiting for V6
2005 Mini Cooper

A wise man overhauls his brakes before his engine.

Was this post helpful or interesting?
Yes No Thank
Martysh Marty Schmitz-Hertzberg
Angus, ON, Canada   CAN
Sign in to contact
1965 MG MGB
1970 MG MGB GT
I use my Sata with a 1.4 tip for both primer and topcoat.. If you thin the primer sufficiently, there is no problem blowing the solids out..( I use Dupont urethane 2 part high build primer) you can lay on a really nice flat coat..so you end up sanding less paint off!! $$$ saved...

I sometimes think I could just polish it right out of the gun, and it would look like a top coat in the primer grey MGB color...

I think that keeping spray equipment clean is one of the keys to success with this work and not getting frustrated.... every time I use the gun, I break it down and clean everything to as new with laquer thinner, reassemble and put away. It is tedious!!

By the way I used 1 gallon of urethane to completely paint inside and out ..my 65 B.. and I still have some left. Thats how effective a HVLP gun is.



Attachments:
September 03 016.jpg    57.6 KB
September 03 016.jpg

Was this post helpful or interesting?
Yes No Thank
Speedracer Avatar
Speedracer Platinum AdvertiserAdvertiser Hap Waldrop
Taylors, SC, USA   USA
Sign in to contact
1961 MG MGB "LL" Lady Lynn"
1967 MG MGB Racecar "The Biscuit"
Thats a pretty blue Marty.


I think having a cheap second gun ofr primer isn't a bad idea as well. Most of this poly primer almost goes on as dry spray anyway. The poly two par primer is one of the best thing to come down the pipeit's so thick it acts a filler for light imperfections and prep sanding. Just get a good coat of primer on the car, most of it will end up in the floor anyway from wet sanding.



Hap Waldrop
Acme Speed Shop
864-370-3000
Website: www.acmespeedshop.com
hapwaldrop@acmespeedshop.com


Member Services:
Select Performance Street Engines, Head Porting, DIY Engine Rebuild Kits with free tech advice, See This Link For Engine Tech, https://www.mgexp.com/forum/vendor-market.68/acme-speed-shop-diy-engine-rebuilding-kits.1828263/ VTO Wheels
Was this post helpful or interesting?
Yes No Thank
. Become a Supporting Member to hide the ad above & support a small business

To reply or ask your own question:

or

Registration is FREE and takes less than a minute

Having trouble posting or changing forum settings?
Read the Forum Help (FAQ) or click Contact Support at the bottom of the page.



. Become a Supporting Member to hide the ad above & support a small business


Join The Club
Sign in to ask questions, share photos, and access all website features
Your Cars
1969 MG MGB GT
Text Size
Larger Smaller
Reset Save