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Technical Hardener into FLAT rustoleum?

Discussion in 'Traditional Hot Rods' started by AGELE55, May 29, 2020.

  1. AGELE55
    Joined: Jan 4, 2018
    Posts: 147

    AGELE55
    Member

    Buddy of mine used rustoleum with catalyst hardener on his rod's control arms, supports, etc. It looks awesome. I thought it was powder coat until he told me.
    So...I'm wanting to try it also, but want a more satin finish. Anyone ever try a catalyst in FLAT rustoleum? Would it turn it glossy?
    If no one knows, then I'll let you know soon...lol
     
    Joe Lemay likes this.
  2. derbydad276
    Joined: May 29, 2011
    Posts: 1,311

    derbydad276
    Member

    buy a quart and try it
     
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  3. Flathead Dave
    Joined: Mar 21, 2014
    Posts: 2,943

    Flathead Dave
    ALLIANCE MEMBER
    from So. Cal.

    I used a sandable primer and rustolium paint on a dash. It looked like a powder coat. It looked great!
     
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  4. irishsteve
    Joined: Jan 10, 2017
    Posts: 803

    irishsteve

    In the auto paint world theres a product called flattening compound.Added to gloss paint it dulls it.
     

  5. AGELE55
    Joined: Jan 4, 2018
    Posts: 147

    AGELE55
    Member

    My theory is that flattened is already in flat paint. Getting close to being ready for a test shoot.
     
  6. I've used hardener with matte black tractor store paint, it did increase the gloss but only to approximately a semi-gloss level. So maybe flat will turn satin?
    Give it a try! I'd like to see your results!
     
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  7. What kind of hardener are you using?
     
  8. Rustoleum is a oil base enamel, make sure what you use is compatible. HRP
     
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  9. AGELE55
    Joined: Jan 4, 2018
    Posts: 147

    AGELE55
    Member

    34536.jpg I bought this at the local hardware store.
     
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  10. Do you have a mix ratio?
     
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  11. lostone
    Joined: Oct 13, 2013
    Posts: 1,331

    lostone
    Member
    from kansas

    Managing a body shop I've seen some of these concoctions end badly.

    I've had customer's come in who have brewed up paint only to have it start peeling within a couple months. Alot I've seen have large checks and cracks show up in a few months due to incompatible products so be sure to read instructions and check for compatibility.
     
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  12. I used both Valspar and Manic. Honestly I believe them to be the same.
    8th oz per gallon. Acetone to thin to desired consistency.
    Holding up good So far! 2 plus years.
    Oil based paint is very forgiving compared to modern automotive paints.
    Not as shinny but I like my old cars to look like old cars ;)
     
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  13. *Majic stupid auto correct
     
  14. AGELE55
    Joined: Jan 4, 2018
    Posts: 147

    AGELE55
    Member

    Can says 8oz to a gallon. Not sure if that means before or after cutting it with mineral spirits.... hmmm
     
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  15. AGELE55
    Joined: Jan 4, 2018
    Posts: 147

    AGELE55
    Member

    You're saying 8th oz per gallon? Instructions say 8oz per gallon...
     
    D-Russ likes this.
  16. AGELE55
    Joined: Jan 4, 2018
    Posts: 147

    AGELE55
    Member

    Understood. Right now I'm planning on shooting the inner fenders control arms, frame, etc..
     
  17. Yes 8 oz per gallon or 2 oz per Quart.

    I've heard of people using a higher ratio of hardened but I have not tried that.
    I like using acetone to thin as it helps the paint dry faster... But that may not be what you want in Florida. LoL

    Also... I have used this hardener with Baer oil based semi gloss paint from home depot! They can mix Thousands of colors for 15 bucks a quart!
    Gives a nice satin sheen.
     
  18. Mike Colemire
    Joined: May 18, 2013
    Posts: 1,228

    Mike Colemire
    Member

    This is good to know because I got 2 qts of black and the same hardner from rural king to do my frame.
     
    AGELE55 likes this.
  19. Flat Six Fix
    Joined: Feb 6, 2010
    Posts: 1,057

    Flat Six Fix
    Member

    While I do not doubt you for a second.
    Heres the scoop on some of these lower end cheap alkyd based enamel scenarios.
    Now alkyd based enamel is not a whole lot different then old school straight synthetic enamels, Dulux for example
    Not wicked glossy and oxidizes pretty quick.
    Alkyd primers, enamels and such I have done the following.
    I have used plain hardware store rust primer cut with urethane grade reducer and sprayed on panels, frames and parts
    Once fully cured have topcoated the frame and parts stuff with rust enamel and hardener, 2k urethane paint and 2 k urethane primers.
    Not 1 had any issues to date, but this primer better be fully cured and it take like 2 to 3 weeks. No production shop has this kinda tyme.
    I have also used fillers, epoxy primer and even plain old lacquer spot putty no issues.
    I have not tried lacquer paint over enamel primers...lol
    Most of these so called rust paints and primers can be cut with acetone, xylene or urethane reducers, generic acrylic enamel hardeners mix in okay too.
    Not sure if Overspray is still with us but he has done a lot of this kinda thing too.
    Just in closing, not everyone wants or can afford the real " paintjob", the kind that costs more than a down payment on a house and keeps your anxiety levels up every time you go for a cruise...lol
     
    '51 Norm, Elcohaulic, D-Russ and 4 others like this.
  20. Here's the Valspar hardener
     

    Attached Files:

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  21. And this is flat black rustoleum slightly thinned with mineral spirits, no hardener, applied with a brush! 20200601_085530_HDR.jpg
     
    '51 Norm, Elcohaulic, AGELE55 and 2 others like this.
  22. Mike Colemire
    Joined: May 18, 2013
    Posts: 1,228

    Mike Colemire
    Member

    I can't use a brush, by the time I'm done I got paint every where and I use twice as much.
     
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  23. big bird
    Joined: Feb 16, 2014
    Posts: 39

    big bird
    Member

    Do some spray-outs on test panels and see if you like the results
     
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  24. AGELE55
    Joined: Jan 4, 2018
    Posts: 147

    AGELE55
    Member

    I'll be spraying the backside of the inner fenders as a test. These will then be shot with undercoat.
     
  25. blazedogs
    Joined: Sep 22, 2014
    Posts: 451

    blazedogs
    Member

    Wasn,t aware there was any kind of hardener compatible with Rustoleum ?
     
  26. I shot the whole frame,axles, backing plates etc with gloss black rustoleum on my 1960 f100 and had nothing but great results. Also with no hardener. You dont need it. Its durable paint and I will use it again.
     

    Attached Files:

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  27. dana barlow
    Joined: May 30, 2006
    Posts: 4,005

    dana barlow
    Member
    from Miami Fla.
    1. Y-blocks

    Make it shin or go home LOL,ho no that's were we should be anyway LOL Really primer is always primer an not finished, no matter what BS name it is given. Finish it shiny,it last longer,looks better and cleans EZ.
     
  28. AGELE55
    Joined: Jan 4, 2018
    Posts: 147

    AGELE55
    Member

    I’ve also used Rustoleum a lot over the years with good results. My 55 frame was done in rustoleum 30+ years ago and still chugging along. I still want to try this because .... oh hell...why not? Lol
     
    56 ford custom likes this.
  29. indyjps
    Joined: Feb 21, 2007
    Posts: 3,907

    indyjps
    Member

    Rustoleum and industrial enamel is very foregiving paint. Once cured out is very durable.

    Mix ratio (industrial enamel hvlp): 6 paint 3 acetone 1/2 hardener for 6/3/.5 8/4/1 is also popular. Consider tip size, typical harbor freight purple gun is 1.4.
    Seen ratios as high as 4 paint 3 acetone.
    Do some spray out, the material is so cheap, I'd rather than waste it learning than worry about orange peel or a run.

    I generally use valspar hardener, any enamel hardener works. Most of the time I throw a dash of hardener in without measuring on small mixes.

    Suggest mixing flat and gloss rustoleum together to get the sheen you want. Its repeatable.

    Paint stores sell flattening agent, it costs more than rustoleum.

    Reducers: Acetone (fast) naptha (med) mineral spirits(very slow). Any real enamel reducer works as well.

    Ive used 20 year old enamel reducer, and hardener in valspar tractor enamel, worked fine.

    I prefer valspar tractor enamel over rustoleum, "seems" to be better quality, it does cover better.
     
    Last edited: Jun 8, 2020
  30. indyjps
    Joined: Feb 21, 2007
    Posts: 3,907

    indyjps
    Member

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