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Clean Up Paint

Discussion in 'Spray Painting and Panel Beating' started by Phillbert, Apr 28, 2019.

  1. Phillbert

    Phillbert Active Member

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    Hi guys, just purchased another car...
    The guy i got it off painted the plastic trim and didn't mask it off, got paint everywhere.

    What is the best way to sort this out?
    I know i have to repaint the trim, that is not my worry
    With the door, can i use some type of solvent to take the pressure can paint off and polish the rest out?

    20190428_190753.jpg
     
  2. losh1971

    losh1971 Well-Known Member

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    General purpose thinners should melt it and won't affect the original baked enamel.
     
  3. Phillbert

    Phillbert Active Member

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    I was thinking that but thought it would take off the original paint as well causing me to repaint the whole door
     
  4. losh1971

    losh1971 Well-Known Member

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    No, not as long as your VS has the same baked enamel that my ute has. I use it a lot and only melts the acrylic.
     
  5. gtrboyy

    gtrboyy Well-Known Member

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    Holdens still acrylic up to vt/x/y maybe later?

    If paint match was as good as prep work paint might buff off or wet sanded.

    Can understand mixing whites up wrong like heron white over alpine but more like etch primer or tan lol
     
  6. losh1971

    losh1971 Well-Known Member

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    you sure VR and VS has acrylic? I sprayed my my ute in parts with acrylic and the acrylic is a lot softer than the original paint. Even 12 months on i can melt the acrylic i have sprayed and the original paint stays exactly as it is.
    I was off the understanding VR and VS Holden exprimented with baked enamel.
     
  7. 1985VK

    1985VK Active Member

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    Use some petrol on a rag and that should get that paint off and not harm the original finish ...
     
  8. EYY

    EYY Well-Known Member

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    Use acrylic thinner and it won’t hurt the 2 pack paint underneath. The thinner will still damage 2 pack paint but won’t melt it the same as acrylic. You’ll need to polish it afterwards.

    It was around 1994they started using 2 pack paints - the luxury models got it first and the base models later on apparently.
     
  9. Phillbert

    Phillbert Active Member

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  10. 1985VK

    1985VK Active Member

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    Huh? Those statements seem contradictory to me...

    Anyway, that is why i suggested to use petrol as a solvent ... i do not know of any factory car paint that was harmed at the bowser ...
     
  11. EYY

    EYY Well-Known Member

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    What I meant was, it won't melt the **** out of 2 pack paint and won't hurt it structurally. It'll take the sheen away a little. If you leave a rag soaked with thinner on the paint for a long period, it will melt in. I probably meant to delete the first line before posting.

    Don't put petrol on your paint. Paraffin's and oils aren't what you want in the pores of your paint.
     
  12. 1985VK

    1985VK Active Member

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    Petrol is just a complex mixture of hydrocarbons. It is less aggressive than thinners. Car paint is designed to have petrol put on it that's why it isn't damaged when some is spilt when refuelling. The petroleum industry spews a lot of voodoo to keep it mysterious and to promote resource scarcity ...

    A typical msds for acrylic thinners http://www.aamtech.com.au/pdf/msds/Septone Acrylic Thinner SDS 2013.pdf
     
    Last edited: Apr 29, 2019
  13. EYY

    EYY Well-Known Member

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    It's designed to protect the material underneath, give an aesthetically pleasing finish and make it easy to clean. 2 pack paints by nature are chemical resistant. Petrol will leave a darker stain on lighter colours if you continually spill it on the paintwork without cleaning it afterwards.

    Ever tried respraying a panel that's been drenched in oil? Paint has pores, much the same as your skin. It's a polymer and will soften when in contact with harsh solvents. Petrol won't be effective in removing the top layer of paint like thinners will.
     
  14. 1985VK

    1985VK Active Member

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    Yeah i agree thinners will be more effective as they are more aggressive.

    Typical composition is toluene, naphtha petroleum, light aliphatic solvent, acetone, ethanol
     
  15. 1985VK

    1985VK Active Member

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    Paint has pores if it dries by solvent evaporation. That is why it is important to do multiple coats to block off the substrate. If these "pores" reach metal they will promote rust by allowing moisture and oxygen. I am not sure paint has pores if the action is by catalyst to cross linking polymers.
     
  16. EYY

    EYY Well-Known Member

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    When I say pores, I mean microscopic peaks and troughs that can hold contaminants such as silicones and oils that make rework a nightmare later on - not necessarily holes in the paintwork.
     
  17. 1985VK

    1985VK Active Member

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    Ah ok ... some of those "pores" are microscopically deep too ...

    Off topic but if you want to stop rust on a steel trailer then spray at least half a dozen coats of paint on it ... spray each coat on at least a few days apart ... metal rusts when atmosphere gets to it so block off the access to atmo ...
     
  18. oska

    oska Active Member

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    if it's just from a pressure can base coat

    metho and a rag will remove it quickly without any other damage to your existing paint
     
  19. Phillbert

    Phillbert Active Member

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    I ended up using thinners, took about 3 hours to get it all off
    Surprisingly the trim was white, so im buggered if i know why he painted it in the first place.
     
    losh1971 likes this.

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