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COMET, Really?

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  • Member since
    October 2019
  • From: New Braunfels, Texas
COMET, Really?
Posted by Tanker-Builder on Thursday, November 3, 2022 12:34 PM

Hi:

       This could be posted in Painting too, but because of the uses I will take you through, it is posted here. COMET, that ubitiqious Home cleaning powder. It's been around for a long time. Many uses have popped up for it. But silently it crept into the tool boxes of Modelers. Why? Well, it's versatile, easy to use, and as rubbing compound, polishing compound and Just plain usable for a lot, it solves spending a little to accomplish a lot.

      Like most home cleansers it is mildly abrasive. It's supposed to be, to scrub the bathroom equipment, kitchen sinks etc. Some modelers in a moment of unknown group think, started to use it to take out heavy scratches in Planes and Cars. Again, Why? Well, it's a great intermediate polishing compound both dry and wet, or close to a thick muddy soup! It works well, gently, on paint too!

     I also found, in working with Lexan, Polycarbonate sheet and Plexi, it is a perfect polish for those things that need to be clear! Styrene, A Breeze! I have more than once used it in the polishing regime for damaged Canopies and Windshields! Works great. Here's a for instance! I had a 1/24 Airfix Kit of a WW-2 Fighter. The canopy somehow got gouged on top rubbing against the box, I guess.

      I sanded it down and wondered after the body shop 600 grit could I get it finer, because sanding marks were visible in some places. Well, I resanded wet, and then used a mud on my fingertips of Comet, rubbing continously with those fingertips till it started to dry.Then I noticed the Canopy was Blemish Free, Well, enough that clear Gloss or Future finished it out and totally restored the clarity! 

      At that time no one had the inkling that the higher grits, 800, 1200, 1600, etc could be used here. I guess we all thought it would be still too coarse. Wrong! But even with that, Comet is a mainstay in my tool area. It is absolutely the best for adding to the scrb water instead of Dawn to get bubble free cleaning of the parts Before the application of Glues or Paint!       NOTE!! For Safety DO NOT Add to water with Dawn in it! The Fumes generated will make you sick. Comet is to be used by ITSELF!!

  • Member since
    July 2004
  • From: Sonora Desert
Posted by stikpusher on Thursday, November 3, 2022 12:58 PM

Just don't mix it with Windex Surprise

 

F is for FIRE, That burns down the whole town!

U is for URANIUM... BOMBS!

N is for NO SURVIVORS...

       - Plankton

LSM

 

  • Member since
    October 2016
  • From: Louisiana Gulf South
Posted by Mrchntmarine on Thursday, November 3, 2022 2:02 PM

So I threw this out in the calling all gurus thread and thought I'd double check here as you seem very familiar with Comet....  I could only find with bleach. 

any issues there you think?  Others said no and I'm going with that - just checking. 

tks!!

Keep on modeling!

All the best,

William

  • Member since
    November 2018
Posted by oldermodelguy on Friday, November 4, 2022 9:00 AM

Mrchntmarine

So I threw this out in the calling all gurus thread and thought I'd double check here as you seem very familiar with Comet....  I could only find with bleach. 

any issues there you think?  Others said no and I'm going with that - just checking. 

tks!!

 

It's mildly bleached and produces the preverbial squeaky clean to the plastic. With bleach it's kind of a one step process in getting rid of skin oils and such while micro scuffing at the same time.. I've use Comet with bleach on plastic with no issue. Also if used with water it's only mildly abrasive as well. On transluscent parts the plastic will go from a clear gloss to a slight hazy shine but with micro scratched if you look close.

Anyway I haven't seen that Comet with bleach is an issue at all, actually a good thing IMO. You will seek your own level of paste consistentcy that you like and works for you.

  • Member since
    August 2005
  • From: Mansfield, TX
Posted by EdGrune on Friday, November 4, 2022 9:30 AM

But it can't be any good, it doesn't have a model manufacturers name on it!

BonAmi is another good household cleanser 

Colgate tooth paste (not gel) contains a mild abrasive and is good for polishing canopies.  

Mr Clean Magic Eraser is one of my go-toos to polish plastic before NMF paint.   It is mildly abrasive and doesn't leave a residue that must be washed away before finishes can be applied

  • Member since
    November 2018
Posted by oldermodelguy on Friday, November 4, 2022 9:46 AM

I use Colgate original tooth paste as well in polishing, be it paint on car bodies or test parts with lacquer or airbrush needles. It's one step in the process at least. Worth keeping around. As mentioned by Ed not the Gel.

  • Member since
    April 2020
Posted by Eaglecash867 on Friday, November 4, 2022 9:58 AM

EdGrune
Mr Clean Magic Eraser is one of my go-toos to polish plastic before NMF paint.   It is mildly abrasive and doesn't leave a residue that must be washed away before finishes can be applied

I hadn't thought of Magic Erasers for that purpose!  I always have plenty of those on-hand because of how much better they are than anything else for cleaning my bathtub and sinks.  Working on an F-100 right now that's going to be partially NMF, so I'll definitely have to give this a try!

"You can have my illegal fireworks when you pry them from my cold, dead fingers...which are...over there somewhere."

  • Member since
    October 2019
  • From: New Braunfels, Texas
Posted by Tanker-Builder on Friday, November 4, 2022 2:27 PM

Hey, Stikpusher!

    You didn't didja? Oh my, That mixing of Comet with Chlorine, with Windex with Ammonia ! Must've scary bad!

  • Member since
    October 2016
  • From: Louisiana Gulf South
Posted by Mrchntmarine on Friday, November 4, 2022 5:18 PM

So with the wife out of town, this was a good day to try the comet paste in the kitchen sink instead of a hot garage!  Having never done this before, I have no benchmark. But after paste and battery toothbrush I didn't seem to notice a big change in sheen of plastic. I then made the paste a bit thicker and used the ole fingers On the sides and bottom. I think that made a difference. 

guessing it's not going to be completely dull / flat ?  Seems to still reflect a little light but not nearly as shiny as before. 

Keep on modeling!

All the best,

William

  • Member since
    October 2019
  • From: New Braunfels, Texas
Posted by Tanker-Builder on Saturday, November 5, 2022 8:06 AM

Well!

       The thing is, using COMET the finish will not be totally dull. It will be more like you experienced. Like a strong Semi-Gloss with emphasis on Gloss. The point is it will give your surface "Tooth" on which the paint will adhere to with tenacity. In all the years I built Revell's Ships, I never had one peel, using Scotch magic mending tape as masking.

  • Member since
    August 2020
  • From: Apex, NC
Posted by gomeral on Friday, November 11, 2022 10:43 AM
I have used neither on my models, so this is just me thinking out loud, but if I remember correctly, Comet/Ajax are alkaline cleaners (some or all with bleach) and Bar Keeper's Friend is an acidic cleaner, so NO BLEACH. We use that extensively in our home for cleaning sinks/etc., and it's quite good with stainless surfaces and the glass cooktop. Might be a good non-bleach alternative for models!
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