Sanding car help??????
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Honda-Tech Member
Joined: Jan 2008
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From: Hickory,nc
Sanding car help??????
Hey, I'm a NOOBie. I'm gonna sand my door and want to know how far do I sand down into the paint.
Do I have to sand all the way down to the meatal or what?
Do I use the block to sand or a sanding machine? Might do more sanding in future>
What type of sand paper do I use?
How do I sand in tight edges/gaps between door and other areas?
If I was to prime the car after the sanding how many coat of prime do I use and how long do I usually take b 4 the prime dry?
About painting and clear coating, I assume It'll be pretty much the same as priming and adding multiple layers of paint as it dry right?
Thanks in Advance.
Do I have to sand all the way down to the meatal or what?
Do I use the block to sand or a sanding machine? Might do more sanding in future>
What type of sand paper do I use?
How do I sand in tight edges/gaps between door and other areas?
If I was to prime the car after the sanding how many coat of prime do I use and how long do I usually take b 4 the prime dry?
About painting and clear coating, I assume It'll be pretty much the same as priming and adding multiple layers of paint as it dry right?
Thanks in Advance.
Honda-Tech Member
Joined: Jan 2007
Posts: 1,202
Likes: 0
From: North Carolina
Re: Sanding car help??????
I can answer some of that, some ill leave to someone else.
1. You dont HAVE to go to bare metal, if the rest of the car isnt bare metal then I wouldnt, the idea of sanding before painting is todull the paint out through the clear so new primer/paint has something to stick to. It cant stick to a smooth shiny surface.
2. Its your choice. If you can machine sand it makes things much more faster and alot less hard.
3. Type of sandpaper would be any wet or dry sandpaper, wetsanding the primer before basecoat is a step that needs to be done, so buying wet/dry would be a good idea.
If something i said needs correcting, then please do so and ill leave the rest up to someone else to answer. Anything I know is from reading/learning and watching my painter/body work guy do work on my car, i plan to take auto body class at some point so i do alot of research.
1. You dont HAVE to go to bare metal, if the rest of the car isnt bare metal then I wouldnt, the idea of sanding before painting is todull the paint out through the clear so new primer/paint has something to stick to. It cant stick to a smooth shiny surface.
2. Its your choice. If you can machine sand it makes things much more faster and alot less hard.
3. Type of sandpaper would be any wet or dry sandpaper, wetsanding the primer before basecoat is a step that needs to be done, so buying wet/dry would be a good idea.
If something i said needs correcting, then please do so and ill leave the rest up to someone else to answer. Anything I know is from reading/learning and watching my painter/body work guy do work on my car, i plan to take auto body class at some point so i do alot of research.
Re: Sanding car help??????
-Hey, I'm a NOOBie. I'm gonna sand my door and want to know how far do I sand down into the paint.
that all depends on what your sanding it down for, are you sanding it down to paint, or to do bodywork, or to just prime ?
-Do I have to sand all the way down to the meatal or what?
again, that depends if your doing bodywork, if the old primer is gone and rust is forming, than yes, other steps like etch primering and using topical rust converters before primer should also be used.
-Do I use the block to sand or a sanding machine? Might do more sanding in future
once again, what is your purpose in sanding down the door. if your sanding it down to do bodywork, its always a good idea to block the entire door down, find your problem area, grind it, do your bodywork and block it. primer it, than guide coat it and block it again.
-What type of sand paper do I use?
that depends if your sanding it down just to paint over, or if your sanding it down to do bodywork and prime it. sanding it just for paint you want to use a high grit, for bodywork and stripping you want to use a lower grit.
-How do I sand in tight edges/gaps between door and other areas?
like a human being. use your fingers and edges of paper. if your wanting to prep door jambs you can use 3m scotch brite pads.
-If I was to prime the car after the sanding how many coat of prime do I use and how long do I usually take b 4 the prime dry?
if your using a 2k urethane primer, depending on the grit sandpaper you use, you will be perfectly fine with 2-3 coats. you need to read the can and look at the flash times, dry times depend on temperature, activator used, thickness of the coat of primer your just sprayed, humidity, etc.
-About painting and clear coating, I assume It'll be pretty much the same as priming and adding multiple layers of paint as it dry right?
painting and clearing are a ton different than priming, priming is simple, you only have one thing to do,fill the scratches. and if you mess up or get some junk in it your gonna be able to block it down and sand it and whatnot. painting and clearing you need to worry about paint coverage, technique and overlap, not building up or going over the same place too many times and creating peel, texture, metallic build up. dirt is and contaminants are things that need to be prevented from getting into the base and clear, runs are a problem if your new at painting and arent using the correct technique, fluid tip, activator, etc.
that all depends on what your sanding it down for, are you sanding it down to paint, or to do bodywork, or to just prime ?
-Do I have to sand all the way down to the meatal or what?
again, that depends if your doing bodywork, if the old primer is gone and rust is forming, than yes, other steps like etch primering and using topical rust converters before primer should also be used.
-Do I use the block to sand or a sanding machine? Might do more sanding in future
once again, what is your purpose in sanding down the door. if your sanding it down to do bodywork, its always a good idea to block the entire door down, find your problem area, grind it, do your bodywork and block it. primer it, than guide coat it and block it again.
-What type of sand paper do I use?
that depends if your sanding it down just to paint over, or if your sanding it down to do bodywork and prime it. sanding it just for paint you want to use a high grit, for bodywork and stripping you want to use a lower grit.
-How do I sand in tight edges/gaps between door and other areas?
like a human being. use your fingers and edges of paper. if your wanting to prep door jambs you can use 3m scotch brite pads.
-If I was to prime the car after the sanding how many coat of prime do I use and how long do I usually take b 4 the prime dry?
if your using a 2k urethane primer, depending on the grit sandpaper you use, you will be perfectly fine with 2-3 coats. you need to read the can and look at the flash times, dry times depend on temperature, activator used, thickness of the coat of primer your just sprayed, humidity, etc.
-About painting and clear coating, I assume It'll be pretty much the same as priming and adding multiple layers of paint as it dry right?
painting and clearing are a ton different than priming, priming is simple, you only have one thing to do,fill the scratches. and if you mess up or get some junk in it your gonna be able to block it down and sand it and whatnot. painting and clearing you need to worry about paint coverage, technique and overlap, not building up or going over the same place too many times and creating peel, texture, metallic build up. dirt is and contaminants are things that need to be prevented from getting into the base and clear, runs are a problem if your new at painting and arent using the correct technique, fluid tip, activator, etc.
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