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Author Topic: Patchy paint finish  (Read 737 times)
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man of kent
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« on: September 26, 2010, 04:39:39 PM »

Any paint experts explain these using rembrandt silver over grey primer...........

Matching spray can from a supplier. Put the paint on, perfect match. Clear laquer on top and it goes darker. Was told to wait 20 minutes before putting laquer on. Is this too short a time as I was told 'the red is leeching through'. Tried a lighter shade and the same thing happened.

And

Put the paint on, perfect match and complete coverage to my satisfaction. 20 minutes latter put the clear laquer on. Wait 24 hours and using compound, T cut and polish rub down. Nice gloss but slightly mottly finish. Perhaps I should put more clear laquer on?
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supercub
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« Reply #1 on: September 26, 2010, 05:14:38 PM »

Im not a pro , But ive had some realy good results even with halfords off the shelf cans ,  On my polo the line between old and new was invisable.


I put loads of the colour on   and waited around 30mins between coats.  (5 iirc)

Then after a night of it drying i put on the clear coat,   then let that dry hard over a day or so.   (without heat)  Then another coat of clear and let it dry again,

After that i cut it back and polished it using halfords cutting compound...

Long winded but worked realy well..  Smiley
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93 2.0 Diamond Estate
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« Reply #2 on: September 26, 2010, 05:33:08 PM »

Your method sounds correct for using wet-on-wet paint products. Using more clear lacquer now would probably cause the top layer of clear lacquer to lift off in time as these products really need to be used when the underlaying painted surfaces are still tacky. JM2PW!

IMHO, You'll never get this colour Sliver or any other metallic paint to match the rest of the cars paintwork when you go edge to edge on car panels though man of kent.

All quality bodyshops will always blend into the surrounding panels on a vehicle to help with a better looking colour match. In other words, say you replaced just the drivers front door on a Carlton? To get it to match, you would have to fade the colour into roughly half of the drivers side rear door and also into almost half of the driverside front wing too otherwise painting the door on its own (i.e. edge to edge) would certainly make the drivers door stand out like a sore thumb. Is this the kind of result you are getting?

So the more panels you replaced on your vehicle, then theres more unreplaced original areas you would have to blend in a colour match by basically overspraying into a neighbouring panel. I hope that what I've written above makes sense???

As for the "FLA" - Fat Ladies Ass paint finish, to avoid this you should always dust on the first few coats of clear lacquer...waiting about 10 to 15 minutes between coats before doing a final heavy coat of clear lacquer to finish up. When dry, use 1200 grit or higher rubbing down paper with lubricant VERY lightly to even out any uneven paint surfaces before finishing off with a suitable cutting compount and resin polish.

The thicker the layer of clear lacquer that is on a vehicle when you finish the wet-on-wet painting process, the better the final finish should be as you've got more clear lacquer to rub down/rub out any imperfections before polishing up the finished article.

HTH! Tongue
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stealthstylz
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« Reply #3 on: September 26, 2010, 07:30:05 PM »

Rembrant is very hard to paint as it contains so many metallic particles. I would say i'm very good at painting with spray tins and I can't get an even finish (hence my satin black car now as the repaired bits I sprayed rembrant looked crap).

Matt
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man of kent
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« Reply #4 on: September 26, 2010, 09:11:14 PM »

Thanks for these comments guys. I think one of my problems is perhaps rushing it and not letting the coats dry properly. At the moment the car looks better than it was which is satifying. When I bought the car from Murph it had a badly dented door which you wouldn't know now and I've filled and painted over some good welding done by carlton Mad who owned it previously. Slowly getting it back to a good one. I think the next step is a proper paint job when I can afford it.

I've sprayed a number of classics with cellulose and knew synthetic metallics could be difficult. Now I know how difficult. If you have lots of dosh, no problem. Oh to be rich.

The other option is to wait till next summer and put a sealer coat on, an art in itself, and then spray Rembrandt silver cellulose which I'm told is available. Maybe not. Its still a metallic with associated problems.

A tip I have been told when using a grey sealer coat and grey primer....... After the sealer coat, give the body a very quick flickover with black so you have lots of black spots, put the grey primer on and when you rub down stop when you see the black spots. If you go through the sealer you have big problems and lots more work. I made this mistake and had to reseal etc, but, months later a ring appeared where i went through. A specialist told me that it could come through ages later, so dont go through a sealer coat.
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diplomat2.6
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« Reply #5 on: September 29, 2010, 06:47:33 PM »

I have two posts on this very matter. (see below). Rembrandt is a terrible colour to match and even new it looks frosty in direct sun. Single pack lacquer is slightly more opaque than two pack so it always looks 'dull' as the flakes don't seem to catch the light in the right way.

http://totalcarlton.com/forums/index.php/topic,7212.0.html

http://totalcarlton.com/forums/index.php?topic=6675.0
« Last Edit: September 29, 2010, 06:56:03 PM by diplomat2.6 » Logged
man of kent
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« Reply #6 on: September 29, 2010, 08:43:39 PM »

Agree with your comments re Rembrandt silver. Spoke to a sprayer yesterday and he said silver metallic was the hardest. Spray cans almost impossible.

He said you have to spray from all angles onto surface and also from every direction on the compass and even then he finds it difficult. Solution - lots of dosh and buy new!

As I've tried a few sources for the cans the best match was definitely Vauxhall. Tried  people who mix to match a few times and not good. One even gave me two extra different shades at no extra cost and they still couldn't match it. What they did say was that in the automotive paint industry there are 6 shades of Rembrandt silver. Dont know if its true. Wouldn't be surprised are there are lots of different shades of black and white.
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diplomat2.6
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« Reply #7 on: September 29, 2010, 10:32:09 PM »

When I purchased mine I used PPG Deltron and there were only 2 variants for Rembrandt. I did run out and bought another litre which was way off - I used it as a first coat and the ppg as the top coat
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