[deegee]

Hey guys,

fixing up some paint on the patrol, around the gutters and on the roof. There is actually a section on the roof about the size of a small plate that blew off back to metal when just using a do it yourself car wash!

I have some rust treatment and primer im going to sand back and re-cover but I wont be repainting the whole car.

my car is paint code 531 GQ white.

As i'll only be doing a couple of sections can anyone suggest or recommend a type/brand of pressure pack paint that will be OK to use?

Supercheap has some paints which are around $20 for a small can which makes me think it would be OK quality if going off price but i don't want to do all this just to have to do it again...

Any suggestions appreciated

DeeG

 

[ReefMagnet]

Yeah that touch up stuff super crap sells is ok. Have heard it mentioned that Autopro do custom mixes as well into pressure packs. One comment I would make is be wary of using epoxy etch primer because it crinkles the original primer if it sprays over it. Besides that 531 white is great because it blends easy and you don't need to horse around with clear coats.

My only complaint with the pressure packs is that they don't put on a very thick coating because the paint is so thin so you have to lay on heaps of coats for a good build up. If you want to extend to a spray gun for larger sections, I have found Dulon acrylic goes on really well and buffs up a treat. Bit pricey but. Last time I bought a litre mixed to 531 it cost $120 with a litre of thinners (it mixes 1:1.5 for spraying). I actually just resprayed all my gutters around the car and about 200mm blended into the roof using the dulon with high build primer underneath and it came up great. I've also used the super crap spray pack for touching up around the rear quarters and it went on ok too.

 

[deegee]

awesome cheers for letting me know

I'll grab a couple of cans.

Yeah i heard can be a bit thin, i plan on doing a lot of light coats to thicken it up.

after the paint ill cut and polish the lot, hopefully should come up nice.

 

[SirKev]

I have had trouble finding Nissan 531 in Port Hedland. Mitsubushi Paris white is a close match.

I have been having troubles using spray pack touchups. The primer lifts the very edge of the paint where it is feathered during sanding. I think that it may be because the paint is damaged & lifting already. It hasn't happened at every repair that I have made.

You may have the same troubles deegee. I started doing touchups for the same reason as you. I blew some paint off with a pressure cleaner, but only down to primer.

Does anyone have any opinions?

Kev

 

[ReefMagnet]

531 white is very common because it is used on a lot of different Nissan models over something like a 20 year period so really shouldn't be too difficult to get. From what I can tell the lifting of the paint is actually the original primer reacting to epoxy etch primer. If you use a regular primer / surfacer it shouldn't lift although in theory the adhesion to the raw metal won't be as good.

 

[GeeCee]

For 531, check out Alaskan White.

 

[SirKev]

Hey Reefmagnet

I am not using etch primer I am using a filler/primer because it has the correct properties to hide that feathered edge. Filler/primer may have similar propereties to etch primer. I will try grey primer followed by filler/primer & post the results here.

regards

Kev

 

[ReefMagnet]

I used some 3m primer surfacer thru a spraygun and it didn't cause any crinkles

 

[SirKev]

I am hoping to avoid having to paint the whole car. If I was using a spray gun I would hit the whole car with an orbital sander & I feel confidant that any damaged paint would be removed, so not an issue.

I tried using grey primer last night, but the same thing happened it is definatley the residual topcoat that crazes & not the original primer. I think that some of the paint no longer adheres well to the original primer so where it is too thin it lifts when the new primer dries. Does anyone have any ideas, besides stripping the whole car?

The frustrating thing is that I have a good set of tools & a place to spray available to me in Perth, but I am in Port Hedland until the end of the year so do not have access to it.

Kev

 

[MQ MAD]

Usually the lifting or frying of paint is a chemical reaction between the paint types
Some paints cant be just applied over other types
But there is a primer that can help with this (cant remember of the top of my head)
Best to consult a paint specialist rather than guessing

 

[Mick..]

There are sealers available to stop the paint frying up but these sealers are only available in a 2 pack system as far as i'm aware. Scan sealer was probably the best made by PPG but it's a 2 pack paint.

The other main reasons your paint is frying up other then the paint being stuffed is one your doing it in cold wheather (highly unlikey this time of year) or your putting your coats of primer on to wet or not leaving enough flash off between coats and the thinners is sofening up your paint edge.

Try rubbing down the affected areas again but this time only dust the first coats on. It may even take 5 just coats just to cover the old paint allowing plenty of flash off between coats but this will stop it frying up. Once it's covered let it dry out and give it another light rub and do the same again only this time you can put it on a little heavier but again don't hammer it on or it will do it again.

Cheers Mick.

 

[SirKev]

Thanks Mick

I will resand & try the very light coats this afternoon.

Your right in that it is unlikely that it is too cool. The temperature here does not fall below 30 until after midnight & I am usually working in the high 30's. I was starting to think that the heat & humidity might be contributing to the problems. The humidity hasn't fallen below 75% since I started the repairs.

Kev

 

[ReefMagnet]

Hey Mick you could be onto something there. I've got some more panel work to do shortly and I'm going to give that a try!

 

[SirKev]

Thanks for the advice Mick.

I think that you were right about the primer being too wet. I did as you suggested & after 6 very light coats of primer there is only the barest discernable lift of the original paint. 1 coat of filler/primer & I think it may come out perfect.

I can't test the finished product for another week because there are no spray packs of the almost correct topcoat due in town until then.

Regards

Kev