STOP THE MADNESS! (A brief primer/filler commentary)

The Rocketry Forum

Help Support The Rocketry Forum:

georgegassaway

Lifetime Supporter
TRF Lifetime Supporter
Joined
Jan 18, 2009
Messages
4,543
Reaction score
376
Use white primer for a light-colored rocket.
NOT a dark primer that will require MANY coats of the lighter paint to cover up!

Fill seams and fill balsa parts BEFORE gluing them together, and gluing to the rocket.

There. It’s out of my system…. for now. :)
 

jqavins

Joseph Avins
TRF Supporter
Joined
Sep 29, 2011
Messages
3,423
Reaction score
1,068
Location
Howard, NY
If it's available, us slightly off white primer when the rocket is going to be white; it lets you see if you've missed a spot with the color coat.

And filling parts before assembly? Hell Yes!
 

mbeels

Yes balsa
TRF Supporter
Joined
Feb 9, 2019
Messages
2,097
Reaction score
972
My local HomeDepot only carries in the grey filler-primer in the store, but I ordered white primer for delivery to the store and pick-up through the website. There are a bunch of colors and variations available. I don't think that this white fills as well as the Rustoleum grey 2:1 in filler-primer, however. But it is sandable, and it does fill to some extent.

https://www.homedepot.com/p/Rust-Ol...Sandable-Primer-Spray-6-Pack-260737/204707458
 

Nytrunner

Pop lugs, not drugs
Joined
Oct 15, 2016
Messages
6,697
Reaction score
2,111
Location
Huntsville AL
don't think that this white fills as well as the Rustoleum grey 2:1 in filler-primer, however. But it is sandable, and it does fill to some extent.
Exactly. I can find several shades of gray to black filler primer at Walmart (auto-section) and other stores, but I haven't seen a white filler primer.

But for that I just do lighter grey filler on the first coat, spot putty, then followup coats in white primer.
 

neil_w

Hunkered down and slowly going crazy
TRF Supporter
Joined
Jul 14, 2015
Messages
9,100
Reaction score
2,416
Location
Northern NJ
I have on multiple occasions painted white top coats over grey filler/primer and it works OK. Nowadays I do try to do a coat of regular primer over the filler/primer though.
 

Wayco

Desert Rat Rocketeer
TRF Lifetime Supporter
Joined
Mar 23, 2011
Messages
3,427
Reaction score
343
Location
Goodyear, AZ
My local HomeDepot only carries in the grey filler-primer in the store, but I ordered white primer for delivery to the store and pick-up through the website. There are a bunch of colors and variations available. I don't think that this white fills as well as the Rustoleum grey 2:1 in filler-primer, however. But it is sandable, and it does fill to some extent.

https://www.homedepot.com/p/Rust-Ol...Sandable-Primer-Spray-6-Pack-260737/204707458
Dang! I have been getting this primer at AutoZone for $8 a can. Thanks for the link, I'm all over that deal!

I have on multiple occasions painted white top coats over grey filler/primer and it works OK. Nowadays I do try to do a coat of regular primer over the filler/primer though.
This is also my preferred method, fill it and then spray white primer over it.
 

Maxitout

Well-Known Member
Joined
Oct 25, 2011
Messages
377
Reaction score
12
I use Kilz primer from Home Depot. It's supposed to be an interior primer, but it's white, covers well, and hasn't had any reaction to the Rustoleum I use over it. It's about $6 a can. I've been using it for years.

Phil L.
 

MALBAR 70

More Rockets Than Room
Joined
Aug 18, 2012
Messages
1,980
Reaction score
371
Location
Athol, Massachusetts
The white Kilz is a nice high-build primer. It's also comparable to Rustoleum 2:1 sandable filler/primer in the way it fills and sands. I'll often use a coat of Rusto 2:1, sand, fill low spots with Bondo glazing and spot filler. Then I'll shoot another light coat of the 2:1(maybe). If its to be a light colored top coat, the rocket gets a good hosing of the white Kilz primer and sanded smooth.
 

mbeels

Yes balsa
TRF Supporter
Joined
Feb 9, 2019
Messages
2,097
Reaction score
972
I use Kilz primer from Home Depot. It's supposed to be an interior primer, but it's white, covers well, and hasn't had any reaction to the Rustoleum I use over it. It's about $6 a can. I've been using it for years.

Phil L.
Is it wet-sandable? How is the odor? I wonder if I could use this stuff indoors during the winter.
 

MALBAR 70

More Rockets Than Room
Joined
Aug 18, 2012
Messages
1,980
Reaction score
371
Location
Athol, Massachusetts
Is it wet-sandable? How is the odor? I wonder if I could use this stuff indoors during the winter.
I've never wet sanded it but I don't see why you couldn't. The odor isn't as strong as most rattle can primers, as it's made for indoor use. I don't know if I'd paint indoors with it as it seems to be quite messy and the over spray gets everywhere, but that could be just me.
 

mbeels

Yes balsa
TRF Supporter
Joined
Feb 9, 2019
Messages
2,097
Reaction score
972
I've never wet sanded it but I don't see why you couldn't. The odor isn't as strong as most rattle can primers, as it's made for indoor use. I don't know if I'd paint indoors with it as it seems to be quite messy and the over spray gets everywhere, but that could be just me.
Hmmm... I wonder if the Kilz primer in a quart tub would work, brushed on, and then sanded.
 
Last edited:

neil_w

Hunkered down and slowly going crazy
TRF Supporter
Joined
Jul 14, 2015
Messages
9,100
Reaction score
2,416
Location
Northern NJ
Hmmm... I wonder if the Kilz primer in a can would work, brushed on, and then sanded.
Ah, the perpetual dream... low-odor filler/primer that can be done indoors. *sigh*
 

cwbullet

Obsessed with Rocketry
Staff member
Administrator
TRF Lifetime Supporter
Global Mod
Joined
Jan 24, 2009
Messages
25,034
Reaction score
3,085
Location
Glennville, GA
My easy primer and painting tutorial is to avoid it. Don't do it and let em earn their pain. If they crash, I just saves from cash and time.
 

Funkworks

Well-Known Member
Joined
Jul 28, 2018
Messages
689
Reaction score
297
... let em earn their pain. If they crash, I just saves from cash and time.
But I've never had a crash!
(and now I'm jinxed and there goes my lucky streak)

I understand that logic but flipping it around: I'd rather make flights worth their while and use a motor in a worthy rocket!

In my case, I don't get to fly very often, so at this point, I'd rather see my colours crash than flying cardboard.
 
Top