[Prissy]

Is there a difference between applying oem bmw paint on an existing painted than making it prime first then apply the oem paint? Is it a bad idea to layer another color of paint on oem bmw paint? I 've never came across this but now I might want to reuse some parts that I have right now on my next car. TIA

[Bobbykurva]

Originally Posted by Prissy

Is there a difference between applying oem bmw paint on an existing painted than making it prime first then apply the oem paint? Is it a bad idea to layer another color of paint on oem bmw paint? I 've never came across this but now I might want to reuse some parts that I have right now on my next car. TIA

If you have to ask this question, then you probably shouldn't be painting. Do yourself a favor, take what you want painted to a shop.

You never paint over paint.

[canucklion]

agreed

Originally Posted by Bobbykurva

If you have to ask this question, then you probably shouldn't be painting. Do yourself a favor, take what you want painted to a shop.

[Prissy]

Originally Posted by Bobbykurva

If you have to ask this question, then you probably shouldn't be painting. Do yourself a favor, take what you want painted to a shop.

You never paint over paint.

hell no I am painting it by myself lol... I am going to take it to the shop for sure but should the part be primed first or it doesn't matter?

[JLL325ci]

Originally Posted by Prissy

hell no I am painting it by myself lol... I am going to take it to the shop for sure but should the part be primed first or it doesn't matter?

Prime first with the same color primer that's curently on the car. Otherwise you may have a color mismatch.

[Prissy]

how about from JB to SB?

[ragingclue]

Oh brother. This won't end well. Painting is not a DIY job for everyone. Especially those with all these questions.

[canucklion]

as said previously, it needs to be primed. Also, if you're taking it to a shop, why ask? the shop pros should be knowledgeable enough to know the answer.

If you're thinking of cheaping out by skipping the priming process, don't, and if the paint shop agrees to you not having to prime the parts for paint, then it's not a good shop after all.

Originally Posted by Prissy

hell no I am painting it by myself lol... I am going to take it to the shop for sure but should the part be primed first or it doesn't matter?

[Healey3000]

Originally Posted by Prissy

Is there a difference between applying oem bmw paint on an existing painted than making it prime first then apply the oem paint? Is it a bad idea to layer another color of paint on oem bmw paint? I 've never came across this but now I might want to reuse some parts that I have right now on my next car. TIA

Hi,

Modern urethane paints cross-link when cured and as a result, the surface needs to be adequately scuffed or sanded before a new coat will adhere to it. Depending on the type of clearcoat, it *may* be possible to scuff, apply basecoat and then clear but the odds are definitely not in your favor.

Most shops will sand down through the existing clearcoat, get into the basecoat a bit (which is extremely thin) and then apply a sanding primer. This is important because you typically need to wet-sand the area to avoid seeing the feathered edge of the old paint showing through. Once the sanding is finished, a basecoat goes on followed by the clear.

It should also be noted that urethanes use isocyanates and without a positive-pressure respirator, you can suffer nervous system damage if you inhale them. A charcoal canister type mask does not block isocyanates.

From a practical standpoint, the majority of the cost for what you need done is in the materials themselves. Skipping proper prep will save you a little but the durability will be severely compromised. Over time, with temperature changes, the bond will fail, resulting in clearcoat failure (which you see on older cars where the clear turns patchy and hazy).

Hope that helps,
Adnan

[Prissy]

Originally Posted by canucklion

as said previously, it needs to be primed. Also, if you're taking it to a shop, why ask? the shop pros should be knowledgeable enough to know the answer.

If you're thinking of cheaping out by skipping the priming process, don't, and if the paint shop agrees to you not having to prime the parts for paint, then it's not a good shop after all.

Originally Posted by Healey3000

Hi,

Modern urethane paints cross-link when cured and as a result, the surface needs to be adequately scuffed or sanded before a new coat will adhere to it. Depending on the type of clearcoat, it *may* be possible to scuff, apply basecoat and then clear but the odds are definitely not in your favor.

Most shops will sand down through the existing clearcoat, get into the basecoat a bit (which is extremely thin) and then apply a sanding primer. This is important because you typically need to wet-sand the area to avoid seeing the feathered edge of the old paint showing through. Once the sanding is finished, a basecoat goes on followed by the clear.

It should also be noted that urethanes use isocyanates and without a positive-pressure respirator, you can suffer nervous system damage if you inhale them. A charcoal canister type mask does not block isocyanates.

From a practical standpoint, the majority of the cost for what you need done is in the materials themselves. Skipping proper prep will save you a little but the durability will be severely compromised. Over time, with temperature changes, the bond will fail, resulting in clearcoat failure (which you see on older cars where the clear turns patchy and hazy).

Hope that helps,
Adnan

Thanks for the help guys, I think I'll just sell my existing parts, and get new ones

[Nikos335i]

You wont have to sell your parts, proper preparation by a good shop will do fine!

Check out my front Hartge lip install:

[Prissy]

Originally Posted by Nikos335i

You wont have to sell your parts, proper preparation by a good shop will do fine!

Check out my front Hartge lip install:

wow nice, how much did it cost you for paint and labor? you had the shop to prime it first right?

[canucklion]

He is located in Montreal, Quebec, how much it costed him is really of no relevance to you. Best thing for you is to either post in the regional forum to find some reputable shops in the NY area and go to those shops to get several price quotes to compare.

And read his post "proper preparation by a good shop will do fine", yes the shop primed it.

Originally Posted by Prissy

wow nice, how much did it cost you for paint and labor? you had the shop to prime it first right?

[Prissy]

Originally Posted by canucklion

He is located in Montreal, Quebec, how much it costed him is really of no relevance to you. Best thing for you is to either post in the regional forum to find some reputable shops in the NY area and go to those shops to get several price quotes to compare.

And read his post "proper preparation by a good shop will do fine", yes the shop primed it.

Another question: How come there are people puting paint over the CF parts (ie: VRS trunk) Isn't that not a good idea or CF is different?

[canucklion]

individual preference.

[ragingclue]

Originally Posted by Prissy

Another question: How come there are people puting paint over the CF parts (ie: VRS trunk) Isn't that not a good idea or CF is different?

There's nothing wrong with painting CF. Some people like the look. You'll probably see a bit of the weave though, so it won't be too smooth.

[Nikos335i]

Originally Posted by Prissy

Another question: How come there are people puting paint over the CF parts (ie: VRS trunk) Isn't that not a good idea or CF is different?

Originally Posted by canucklion

individual preference.

Originally Posted by ragingclue

There's nothing wrong with painting CF. Some people like the look. You'll probably see a bit of the weave though, so it won't be too smooth.

As others have stated it`s a matter of choice and preference. There are two main reasons for CF, the look of CF or the weight saving hence why people paint these parts once installed.

[Nikos335i]

Originally Posted by Prissy

wow nice, how much did it cost you for paint and labor? you had the shop to prime it first right?

BTW thanks! As for the primer I didn`t ask for them to prime it. They have to otherwise your paint will flake off!!!!

Ask your local area E90 community members references for good local shops and get a couple of quotes for what you would like to have done. Go with the one that you are more comfortable with.

Cheers!

[Prissy]

thanks nick!