Measuring Tiny Quantities of Paint

Discussion in 'Workshop Tips and Secrets / Tools' started by Kyle Boatright, Nov 22, 2015.

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  1. Nov 22, 2015 #1

    Kyle Boatright

    Kyle Boatright

    Kyle Boatright

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    I need to touch up some epoxy primer on a wingtip bow. We're talking maybe 10 square inches of surface. I'd like to use my airbrush on this.

    The question is how to accurately measure the small quantities of the two liquids? A pipette is probably the way to go, but I don't have one.

    I do have accurate scales, but the epoxy manufacturer (This is the Poly-fiber epoxy primer) doesn't list a "by weight" ratio. Presumably, I could measure out a substantial quantity (6 liquid ounces, say) and weigh those samples to develop a "by weight" ratio to use for small quantities.

    Any better ideas?
     
  2. Nov 22, 2015 #2

    TFF

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    Eyeball accuracy ok
     
  3. Nov 22, 2015 #3

    Himat

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    Syringes, one for each component.
    Around here, the chemist have the smaller sizes, industrial suppliers do have the larger sizes.
    As long as you don't need the needles, usually no questions asked.
    Clean with alcohol after use or throw away.
     
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  4. Nov 22, 2015 #4

    cvairwerks

    cvairwerks

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    Kyle: Try the local pharmacy for syringes for oral use. If those are too big, then you could probably get a couple of the normal ones for insulin use and just toss the needles. Last resort would be a glass eye dropper from the first aid section.
     
  5. Nov 22, 2015 #5

    BJC

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    Any decent agricultural supply store will have syringes that will meet your need. Get a few 18 or 20 gauge needles, and suck the epoxy components into the syringes without getting it all over the syringe.


    BJC
     
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  6. Nov 22, 2015 #6

    Dana

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    I would use the 1oz mixing cups commonly used for epoxy, the same thing you find on Nyquil bottles.

    Dana
     
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  7. Nov 22, 2015 #7

    Eagle

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    My concern would be whether the airbrush will spray thicker materials like a primer. Primer spray guns usually use a larger nozzle
    to accomodate the higher viscosity of primer. Maybe one of the small and very inexpensive Harbor Freight HVLP guns might work.
    I know they do a good job on door jams and other small areas.
     
  8. Nov 22, 2015 #8

    Pops

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    I routinely spray small parts with Poly Fiber epoxy primer with my cheap airbrush that I bought about 40 years ago to use on model airplanes. Just add a little extra reducer until it sprays correctly and use a little extra air pressure. I also put any extra primer that I don't use in the freezer. It will be OK to use for about a month.

    Dan
     
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  9. Nov 22, 2015 #9

    Dan Thomas

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    I do this all the time, and use stainless steel measuring spoons I got at the dollar store. The set cost maybe two bucks. Plastic spoons would get eaten by paint and thinners.
     
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  10. Nov 22, 2015 #10

    Midniteoyl

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    This.. ^^
     
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  11. Nov 22, 2015 #11

    Kyle Boatright

    Kyle Boatright

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    I like this idea. The dollar store is right around the corner.
     
  12. Nov 23, 2015 #12

    Kyle Boatright

    Kyle Boatright

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    As it turned out, this was a horrible idea. The Dollar store didn't have any stainless measuring spoons, but I did come home with numerous bags of jelly-beans, which are the very last thing I need. I blame you. ;-)

    Publix, on the other hand, had the spoons.
     
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  13. Nov 23, 2015 #13

    Midniteoyl

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    Hahahaha.. My weakness there is the Chocolate Chunk cookies and the Orange Slices :)
     
  14. Nov 23, 2015 #14

    Rockiedog2

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    a small straight wall cup(cut the top off of a pill bottle ). mark a small stick at the desired level(use a ruler) for the several ingredients, hold to the inside of the cup wall and pour to the lines. all lines on one stick. or do as somebody said and just eyeball it...using Polyfiber stuff it'll be OK if you're a fair eyeballer
     
  15. Nov 24, 2015 #15

    bmcj

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    Don't forget the (marshmallow) circus peanuts!
     
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