Sanding Nubs

BobaTi

New Member

• May 14, 2017

• #1

Beginner question here. I've watched a ton of YouTube videos on dealing with nubs.
I've seen people use varying ranges of sandpaper grits.

Some start with 100 and finish with 300, others work in the thousands.

So I have two questions:

Is there a consensus on the best range of grits to use when smoothing nubs to the original polish?

What grits are the buffing/polishing sponges typically? Would a 12000 grit be comparable to one of these buffing sponges?




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rbeach84

Sr Member

• May 29, 2017

• #2

Do you mean the points where an injected plastic kit part attaches to the "sprue"? It doesn't usually require polishing to the original smoothness but if you are working to that goal, I recommend a 4-in-1 nail sanding stick, designed to sand fingernails to a polished finish. Find them at beauty supply places (along with lots of other useful sanding blocks, etc. - strange how much finishing nails take!)

Having all the four needed grits on one stick makes it really convenient for any smoothing/polishing task.

Cheers!
Regards, Robert

 

newmagrathea

Sr Member

• May 31, 2017

• #3

I think it depends on where the "nub" is. I'm pretty good with an exacto knife and often times don't need to sand much.

 

Richard Baker

Sr Member

• May 31, 2017

• #4

If I can get my sprue cutters in the right position there is very little left- usually a scrape with a blade or a little work with the Xacto razor file cleans it up just fine.

 

H

Heluba

New Member

• May 31, 2017

• #5

Richard Baker said:

If I can get my sprue cutters in the right position there is very little left- usually a scrape with a blade or a little work with the Xacto razor file cleans it up just fine.

Click to expand...

Yea that's how I usually go, I drag the blade backwards

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K

kwisatz

Member

• May 31, 2017

• #6

I use Style X brand sanding sticks and have every grit they make. I usually only use 400, 600, 800 grits. The sticks with multiple grits mentioned above are also handy. Early on I was obsessed with filing the nub down flawlessly and would polish it with a 1200 grit stick but that didnt last long. My recommendation is get a multi stick or a 400 snd 800. 400 to quickly knock back a poor cut and 800 to finish the job.

 

A

Automaton

Well-Known Member

• May 31, 2017

• #7

If it's on the outside of a mating edge, as long as you can get a tight fit between parts, it's sometime best to assemble then sand the excess off.

Most of the time I use a blade to get rid of anything big then a few quick strokes of a nail file and 800 grit to finish. If I end up with any scratches primer won't fill, I use 1200 then 2500 to sand those out.

 

Vim Fuego

Well-Known Member

• May 31, 2017

• #8

You all might think this is weird, but I've started using a piece of blank newsprint paper for the final rubdown after sanding.

People don't realise just how abrasive some papers can be, but it does a great job of bringing sanded surfaces up to a semi-polished state and highlighting scratches that might need a little more attention.