Scratch on underbody, how to best protect?
Thread Starter
Mach 1 Member
Joined: September 10, 2006
Posts: 621
Likes: 5
From: Dallas, TX
Scratch on underbody, how to best protect?
I put a tiny nick and scratch in the paint on my car’s under body while performing some work. What is the best way to protect from any future rust which might occur?
I live in the south and the car is not exposed to road salt. I asked a friend and he just laughed at me, thinks I am too **** about my car ('tis true though)!
I was thinking of using engine enamel as it’s in a high temperature area. Is there a better option such as touch up paint or do I even need to worry about it?
Tim
I live in the south and the car is not exposed to road salt. I asked a friend and he just laughed at me, thinks I am too **** about my car ('tis true though)!
I was thinking of using engine enamel as it’s in a high temperature area. Is there a better option such as touch up paint or do I even need to worry about it?
Tim
Last edited by tdbrown75; Jan 13, 2009 at 07:19 AM.
Legacy TMS Member
Joined: February 2, 2004
Posts: 7,648
Likes: 675
From: Insane
No, no, no, you are all *WRONG*.
The best solution is to completely tear down the car to the unibody, then dip that into an acid strip solution, and then dip it into the galvanized coating, and then paint it with Por-15.
But, that's a little extreme. So what you do is you put the car on a rotisserie and tilt it 90 degrees so you can work on it good. Then get out a dremel with a sanding pad or maybe a little steel brush, and scrape up the problem area so it's all clean of debris and/or rust. You may want to sand it a little to smooth it out too.
After that's done, you clean the entire underside with a good solvent, such as lacquer thinner, for example, although I'm not real certain it wouldn't damage something else, but let's just go with that for now. Use a nice stiff nylon brush, and if needed, a toothbrush works well for small areas. Get it nice and clean.
Now you can spray on a layer of Por-15, which will encapsulate the underside in a rock hard substance that will never chip again.
Tada, instant underbody protection and fix at the same time. Should only take you 3-4 days, easy. Just put the car back on the ground (on it's wheels, mind) and off you go.
Of course, when rotisserieing the car, you might want to drain all fluids and remove the battery, just in case. It'll probably be ok though.
Oh, and the spray gun you use will be forever ruined by the Por-15 use. And you may need 3 or 4 of them, this stuff is that awesome at sticking and not coming off... or in this case, plugging up things.
/or just don't worry about it, maybe, I guess
//whatever.
The best solution is to completely tear down the car to the unibody, then dip that into an acid strip solution, and then dip it into the galvanized coating, and then paint it with Por-15.
But, that's a little extreme. So what you do is you put the car on a rotisserie and tilt it 90 degrees so you can work on it good. Then get out a dremel with a sanding pad or maybe a little steel brush, and scrape up the problem area so it's all clean of debris and/or rust. You may want to sand it a little to smooth it out too.
After that's done, you clean the entire underside with a good solvent, such as lacquer thinner, for example, although I'm not real certain it wouldn't damage something else, but let's just go with that for now. Use a nice stiff nylon brush, and if needed, a toothbrush works well for small areas. Get it nice and clean.
Now you can spray on a layer of Por-15, which will encapsulate the underside in a rock hard substance that will never chip again.
Tada, instant underbody protection and fix at the same time. Should only take you 3-4 days, easy. Just put the car back on the ground (on it's wheels, mind) and off you go.
Of course, when rotisserieing the car, you might want to drain all fluids and remove the battery, just in case. It'll probably be ok though.
Oh, and the spray gun you use will be forever ruined by the Por-15 use. And you may need 3 or 4 of them, this stuff is that awesome at sticking and not coming off... or in this case, plugging up things.
/or just don't worry about it, maybe, I guess
//whatever.
Last edited by houtex; Jan 13, 2009 at 07:18 PM.
Thread Starter
Mach 1 Member
Joined: September 10, 2006
Posts: 621
Likes: 5
From: Dallas, TX
No, no, no, you are all *WRONG*.
The best solution is to completely tear down the car to the unibody, then dip that into an acid strip solution, and then dip it into the galvanized coating, and then paint it with Por-15.
But, that's a little extreme. So what you do is you put the car on a rotisserie and tilt it 90 degrees so you can work on it good. Then get out a dremel with a sanding pad or maybe a little steel brush, and scrape up the problem area so it's all clean of debris and/or rust. You may want to sand it a little to smooth it out too.
After that's done, you clean the entire underside with a good solvent, such as lacquer thinner, for example, although I'm not real certain it wouldn't damage something else, but let's just go with that for now. Use a nice stiff nylon brush, and if needed, a toothbrush works well for small areas. Get it nice and clean.
Now you can spray on a layer of Por-15, which will encapsulate the underside in a rock hard substance that will never chip again.
Tada, instant underbody protection and fix at the same time. Should only take you 3-4 days, easy. Just put the car back on the ground (on it's wheels, mind) and off you go.
Of course, when rotisserieing the car, you might want to drain all fluids and remove the battery, just in case. It'll probably be ok though.
Oh, and the spray gun you use will be forever ruined by the Por-15 use. And you may need 3 or 4 of them, this stuff is that awesome at sticking and not coming off... or in this case, plugging up things.
/or just don't worry about it, maybe, I guess
//whatever.
The best solution is to completely tear down the car to the unibody, then dip that into an acid strip solution, and then dip it into the galvanized coating, and then paint it with Por-15.
But, that's a little extreme. So what you do is you put the car on a rotisserie and tilt it 90 degrees so you can work on it good. Then get out a dremel with a sanding pad or maybe a little steel brush, and scrape up the problem area so it's all clean of debris and/or rust. You may want to sand it a little to smooth it out too.
After that's done, you clean the entire underside with a good solvent, such as lacquer thinner, for example, although I'm not real certain it wouldn't damage something else, but let's just go with that for now. Use a nice stiff nylon brush, and if needed, a toothbrush works well for small areas. Get it nice and clean.
Now you can spray on a layer of Por-15, which will encapsulate the underside in a rock hard substance that will never chip again.
Tada, instant underbody protection and fix at the same time. Should only take you 3-4 days, easy. Just put the car back on the ground (on it's wheels, mind) and off you go.
Of course, when rotisserieing the car, you might want to drain all fluids and remove the battery, just in case. It'll probably be ok though.
Oh, and the spray gun you use will be forever ruined by the Por-15 use. And you may need 3 or 4 of them, this stuff is that awesome at sticking and not coming off... or in this case, plugging up things.
/or just don't worry about it, maybe, I guess
//whatever.
Tim
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