Fixing scratches in colored FG

The Rocketry Forum

Help Support The Rocketry Forum:

Swissyhawk

Well-Known Member
Joined
Sep 11, 2013
Messages
260
Reaction score
2
I'm building my first colored (other than green) FG rocket. One of the selling points is that no paint is required. However, the body tube has a pretty good scratch on it and the fins have some scratches on them. It's not a big deal but I was wondering if there is any recommended way to cover them up or to remove them. The only thing I found searching the forums was to finish it with Future Floor Finish (now called SC Johnson Pledge Floor Care Multi-Surface Finish). Does the Future Floor Finish cover up the scratches? Is there some other way to cover or remove the scratches? Thanks.

IMG_0284.jpgIMG_0285.jpg
 

jd2cylman

Still not Carl... ;-)
TRF Supporter
Joined
Jun 17, 2011
Messages
5,227
Reaction score
1,049
Are the scratches deep? If so, then lightly sand them, matching the direction of the weave (if possible), then spray with clearcoat. Or just spray with clearcoat if the scratches are light. At least that's what I'd try...
 

Binder Design

Well-Known Member
Joined
Jan 18, 2009
Messages
1,823
Reaction score
240
Wet sand the whole fin until scratches are gone, then buff out with rubbing and polishing compounds. Finish off with automotive wax. Basically how surfboards are finished. Paint is easier. :)
 

ksaves2

Lifetime Supporter
TRF Lifetime Supporter
Joined
Nov 25, 2009
Messages
6,264
Reaction score
490
Location
Central Illinois
Wet sand the whole fin until scratches are gone, then buff out with rubbing and polishing compounds. Finish off with automotive wax. Basically how surfboards are finished. Paint is easier. :)

Ditto and it would take care to use very fine sandpaper 800, 1000, 1500, 2000, 2500 and a lot of elbow grease. I salvaged a paint job that had a few globs from drip buildup I very very carefully wet sanded, 'cause if you get to primer ya gotta respray.
Once the globs were even with the color coat layer, shot the clear and set sanded, rubbing compound, polishing compound and car wax. Beautiful until it starts getting dings from flying and hangar rash.

Another way to think of it is you won't be able to see the scratches when you're waiting for the rocket to launch. Too far away to see. Kurt
 

crossfire

Lifetime Supporter
TRF Lifetime Supporter
Joined
Jan 16, 2011
Messages
4,890
Reaction score
676
With scratches like that in the fins only real hope is to paint them black. Once you sand the G10 fins the top finish is gone.
 

Swissyhawk

Well-Known Member
Joined
Sep 11, 2013
Messages
260
Reaction score
2
With scratches like that in the fins only real hope is to paint them black. Once you sand the G10 fins the top finish is gone.
That's what I was worried about. I noticed when I beveled the edges, that the inside was more grayish than black. Evidently the black is just on the surface.
 

ksaves2

Lifetime Supporter
TRF Lifetime Supporter
Joined
Nov 25, 2009
Messages
6,264
Reaction score
490
Location
Central Illinois
That's what I was worried about. I noticed when I beveled the edges, that the inside was more grayish than black. Evidently the black is just on the surface.
I stopped being a perfectionist with rocket paint jobs a long time ago. The thin walled spiral wound glass tubes are translucent and shows the Proline 4500 epoxy slop used on the motor centering rings to secure them.
Looks like hell but the rocket flies fine. I got over it. One nice thing I can see that the tracker LED is on through the colored nosecone. No, it's not black. Can't do it with a black NC.

Here's what you do. Build the rocket, fly the daylights out of it and if you get bored with it, it survives all your abuse THEN paint it and your problem is solved. At least for a time until it gets all dinged up from flying or hangar rash.:shock: Kurt
 

jd2cylman

Still not Carl... ;-)
TRF Supporter
Joined
Jun 17, 2011
Messages
5,227
Reaction score
1,049
With scratches like that in the fins only real hope is to paint them black. Once you sand the G10 fins the top finish is gone.
Yep, I didn't click on the pics. I just thought about the tube.
 

jd2cylman

Still not Carl... ;-)
TRF Supporter
Joined
Jun 17, 2011
Messages
5,227
Reaction score
1,049
I stopped being a perfectionist with rocket paint jobs a long time ago. The thin walled spiral wound glass tubes are translucent and shows the Proline 4500 epoxy slop used on the motor centering rings to secure them.
Looks like hell but the rocket flies fine. I got over it. One nice thing I can see that the tracker LED is on through the colored nosecone. No, it's not black. Can't do it with a black NC.

Here's what you do. Build the rocket, fly the daylights out of it and if you get bored with it, it survives all your abuse THEN paint it and your problem is solved. At least for a time until it gets all dinged up from flying or hangar rash.:shock: Kurt
Yeah, I've gotten a lot less picky about paint these days too... When it sits out on the B or D pads, no one can see the runs... :blush:
 
Top