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Thread: How to Mix IPA for Inspecting Correction Results

  1. #11
    Director of Training Mike Phillips's Avatar
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    Re: How to Mix IPA for Inspecting Correction Results

    The goal of this article was to give everyone some information about this popular step and a foundation to build on for any direction you want to go with wiping down paint to inspect it for various reasons.

    I couldn't find a single article anywhere on the Internet for this practice, just recommendations all over the board as it relates to dilution strengths, so this was just an attempt to provide people with a starting point for some basic information.

    Now that it's finished, each person can do their own research and then make-up their own mind as to how they want to proceed. Use 91% straight, or any variation if you determine this is a procedure you want to perform.

    My goal was to provide some information that would provide some level of safety as well as some other options for the procedure including answering some common questions.

    Safety First
    Remember to wear gloves, an chemical resistant apron and safety glasses whenever you're working with chemicals.

    Better safe than sorry...


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  2. #12
    Senior Member SATracker's Avatar
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    Re: How to Mix IPA for Inspecting Correction Results

    GREAT article, Mike...thanks.

  3. #13
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    Re: How to Mix IPA for Inspecting Correction Results

    Hey Mike, the reason I thought this was a great article is that I've heard about alcohol wipe downs but never quite understood how it worked. I figured ya just bought a bottle of alcohol and had fun. Your article is very thorough and very well researched. So, thanks.

  4. #14
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    Re: How to Mix IPA for Inspecting Correction Results

    Another great article by Mike! Thanks for taking the time to explain what we are exactly doing to our paint. And more importantly, what the IPA is doing to our paint chemically.

    For those of you like me, who have a few different size spray bottles, here is the math to figure out your total percentage of IPA in your mix.

    X(Y/Z)

    Where
    X= The percentage of your IPA
    Y= Amount of IPA in ounces added to your spray bottle
    Z= Total volume of spray bottle in ounces

    Let's use Mike's formula as an example. 4oz of 91% IPA in a 32oz spray bottle gives us a total percentage of IPA of 11.3%.
    .91(4/32) = .11375 or 11.357%

    So if we were to use a smaller, say 22oz bottle we can now figure out how much IPA to add to achieve our target of 10%.
    .91(3/22) = .12409 or 12.409%
    So, we get 12.4% IPA when we use 3oz of 91% IPA diluted in a 22oz spray bottle.

  5. #15
    Senior Member jpegs13's Avatar
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    Re: How to Mix IPA for Inspecting Correction Results

    Let me see if I have this right..

    IPA can be detrimental to the paint and finish.

    Mineral Spirits are volatile and can turn my garage or laundry room into an inferno.

    Now my question(s)

    Would paint cleaner be the safest, most effective method of removing polish residue?

    If so what pad would be used on my DA?

    Thanking in advance.....
    John
    Mean people suck

  6. #16
    Senior Member jpegs13's Avatar
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    Re: How to Mix IPA for Inspecting Correction Results

    somebody help a brother out
    John
    Mean people suck

  7. #17
    Director of Training Mike Phillips's Avatar
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    Re: How to Mix IPA for Inspecting Correction Results

    Hi John,

    Just to comment on your above post point-by-point...

    Quote Originally Posted by jpegs13 View Post

    Let me see if I have this right..

    IPA can be detrimental to the paint and finish.
    The problem with IPA is that it can make the surface of the paint soft and then when you wipe the paint your wiping cloth could potentially mar or even scratch the paint. I have a black test panel in the garage right now that I've been testing compounds on and after the tests I wiped the two sections with IPA and a microfiber to inspect the results and you can see straight-line scratches in the direction I wiped off the IPA. They are very fine or shallow but there just the same.

    The hoods in the studio are repaint so they are very different from factory paint and in this case softer, so that could be where the issue lies with this kind of process.

    So IPA works well with compounds and polishes to remove residual polishing oils but with it comes some risk.


    Quote Originally Posted by jpegs13 View Post

    Mineral Spirits are volatile and can turn my garage or laundry room into an inferno.
    IPA is volatile, in its strongest version, 91% it's probably more volatile than MS

    Used with common sense, you shouldn't have a problem. MS sure wipes easier over paint as compared to IPA


    Quote Originally Posted by jpegs13 View Post
    Now my question(s)

    Would paint cleaner be the safest, most effective method of removing polish residue?
    Yes and no.

    Yes, applying and working a quality paint cleaner over a previously polished surface will act to remove any polishing oils left by the previous product.

    No, because the paint cleaner will leave its own residual polishing oils or "whatever" it is using for a carrying agent(s) and any other ingredients used to suspend the cleaning agents.

    If the goal is to strip the paint free after the last polishing step to leave nothing but a clean or naked base then using a paint cleaner will not accomplish this goal.

    You're back to chemically stripping using,

    • IPA
    • MS
    • Detergent Wash
    • Some other liquid chemical for wiping


    Question: What are you going to use for your LSP?


    Quote Originally Posted by jpegs13 View Post

    If so what pad would be used on my DA?

    Thanking in advance.....
    For a light paint cleaner, a polishing or finishing foam pad would work, usually you're always working forwards in the process so that would tend to lead you to use a finishing pad.


    Mike Phillips
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  8. #18
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    Re: How to Mix IPA for Inspecting Correction Results

    Thanks, Mike, for another excellent article. Keep 'em coming.

  9. #19
    Senior Member jpegs13's Avatar
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    Re: How to Mix IPA for Inspecting Correction Results

    Thanks Mike!
    John
    Mean people suck

  10. #20
    Senior Member mc2hill's Avatar
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    Re: How to Mix IPA for Inspecting Correction Results

    Great article Mike! I have always used and recommended 50/50 IPA, because that what everyone did. Now you have made me think about it more (mostly a good thing!).

    A question (I appologize if you mentioned this in the article) -
    Do you leave the IPA mixture in the bottle after you finish a project or do you mix a new batch each time?

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