I need help to kill my paint!

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baseballlover1

New member
I have a 77 911 that was painted red tho its origional color was brown. It wasnt sanded when it was repainted.... so the real paint is under it :). I am going to be taking about 4-6 mils off the paint. I am def wet sanding. Do you think that an air sander is necessary? Or should i just use a low grit then start refining it?



,daniel
 
I wetsanded through 5 mils last night with 2500 gritt... it is brown underneath it. the 911 is a monocock and nothing is bonded and everything is straight... its brown for sure.
 
no lol. Only thing is it took me like 45 mins to just do a square 2 inches. But i was using 2500 grit. should i step it down to like 1500?



Or should i get an air sander and get abralon pads?
 
baseballlover1 said:
I have a 77 911 that was painted red tho its origional color was brown. It wasnt sanded when it was repainted.... so the real paint is under it :)
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Using 2500 to remove paint is like taking a knife to a gun fight. I'm confused by your intention here? Are you prepping your car for a repaint? If so, you need a much coarser paper. What are you trying to accomplish?
 
Holy crap. This is a process even most body shops can't get perfect.



Sanding an entire car like this will most definitely require a rotary sander and many hours. Do you have a lot of experience in paint/body work?
 
Sorry Daniel, but you'll never do it. Don't waste your time. It can't be done. You'll end up destroying your finish and cause more trouble for the body shop when they have to repaint it.
 
David Fermani said:
Sorry Daniel, but you'll never do it. Don't waste your time. It can't be done. You'll end up destroying your finish and cause more trouble for the body shop when they have to repaint it.
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How will i cause more trouble? Im taking off paint that they would have to take off anyway. And if i screw it up... ile just sand the whole thing down and then take it to the body shop to paint.



I for some reason think i can def do it... its just a matter of how much time and what equipment i use... i might be wrong though. I will try to get like a foot area done tonight and i will show you guys...



,daniel
 
They don't sand the brown paint off, they just scuff it to get the new paint a surface to bond to. There is still brown paint, but it was probably roughed up so bad that polishing it is going to be a mess.
 
baseballlover1 said:
How will i cause more trouble? Im taking off paint that they would have to take off anyway. And if i screw it up... ile just sand the whole thing down and then take it to the body shop to paint.



I for some reason think i can def do it... its just a matter of how much time and what equipment i use... i might be wrong though. I will try to get like a foot area done tonight and i will show you guys...



,daniel
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Many reasons....

For one, there's no way you'll be able to sand down/away all the Red without damaging the Brown. Especially with 1200, 1500, 2000, 2500 and/or 3000 grit.



Secondly, any time a shop preps a panel for paint, it gets sanded with something heavy like 320 grit or so to promote adhesion. When they do this, there's no way to refine and/or buff this level of surface abrasion away. Especially when these deep sanding marks are filled with paint (red).



Third, after you realize you need a heavy sandpaper and use one to remove the Red paint, you will most likely create some major waveyness in the surface while you're destroying it. Then, when you take it to the body shop, they'll charge you more for all the extra block sanding they'll need to do to get it flat again for the repaint.
 
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