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

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georgegassaway

Lifetime Supporter
TRF Lifetime Supporter
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
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!

Nytrunner

Pop lugs, not drugs
Where can you get white filler primer?

mbeels

Yes balsa
TRF Supporter
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

AfterBurners

Well-Known Member
Duplicolor makes good primer and paints

Nytrunner

Pop lugs, not drugs
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
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.

mbeels

Yes balsa
TRF Supporter
But for that I just do lighter grey filler on the first coat, spot putty, then followup coats in white primer.
Yeah, I haven't found a white filler-primer either. The white primer on grey filler-primer sounds like a good approach.

Wayco

Desert Rat Rocketeer
TRF Lifetime Supporter
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

Phil L.

MALBAR 70

More Rockets Than Room
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
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
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
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.

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neil_w

Hunkered down and slowly going crazy
TRF Supporter
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*

MALBAR 70

More Rockets Than Room
Hmmm... I wonder if the Kilz primer in a quart tub would work, brushed on, and then sanded.
Never used the stuff in the tub on a rocket. We've used it at work to cover some nasty, grimy stains on the walls though.

cwbullet

Obsessed with Rocketry
Staff member
Administrator
TRF Lifetime Supporter
Global Mod
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
... 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.

H_Rocket

Death by Powerpoint
Use white primer for a light-colored rocket.
NOT a dark primer that will require MANY coats of the lighter paint to cover up!
Actually I tint the primer with the top coat color...

5x7