Tar spots on water based paint,any change? - Renault Forums :: Independent Renault forum

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post #1 of 9 (permalink) Old 10th March 2012 Thread Starter
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Tar spots on water based paint,any change?

Normal procedure for me on solvent metallics:

Once or twice a year ,generally in the summer months when tar is softer and there are more spots:
clean spots off with a petrol soaked rag
dab in paint to stone chips.
Wash and chamois car
reapply polish as rubbing with petrol soaked rag is gonna take it all off.
This worked fine for me.

Now the whole finish is water based ,should the routine be varied?

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post #2 of 9 (permalink) Old 10th March 2012
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Re: Tar spots on water based paint,any change?

Water-based paint still has a solvent-based clearcoat.

But tread carefully on this, as the lacquer is the only protection the paint has.

Personally speaking, I would use a very fine brush to dab the tar spots, then wipe off with a wet cloth.

Also, don't do this in direct sunlight, as the lacquer will be softer.



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post #3 of 9 (permalink) Old 11th March 2012
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Re: Tar spots on water based paint,any change?

why not clay bar and then wax and seal the paintwork once or twice a year? I generally clay bar and wax and seal paintwork and that lasts for about a year. The industrial fallout doesn't stick on the paintwork and washes of during my regular washes
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post #4 of 9 (permalink) Old 11th March 2012
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Re: Tar spots on water based paint,any change?

White spirit is much less aggressive than petrol - it takes a bit longer but works well. Just dab the spots - vigorous rubbing should be avoided.

Try not to use abrasives it will only erode the layer of laquer.
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post #5 of 9 (permalink) Old 11th March 2012 Thread Starter
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Re: Tar spots on water based paint,any change?

Thx for the tips guys, but I would if still on my old type paintwork use the method Id allways used, paintwork was pristine when car was scrapped, well didnt look older than a year.

I mean I tried proprietary tar spot removers over the years ,paraffin,white spirit probably not, just cos in my own mind at least i thought of it as a paint solvent , but in the end I found the rapid wipe removal of petrol rag the best , for me as long as the area was washed immediately after, then polish up when the car had been despotted.
Part of the reasoning was paint finishes have to be resistant in some degree to petrol, since its probably splashed on cars a lot at filling stations.

This newer, to me, paint stuff is an unknown quantity
1. the 100% genuine renault touch up "kit" is a single pack,whatever lacquer finish comes on a "stone chip" fix is in the paint itself.
If the chip was deep enough Id have to apply a primer/rust inhibitor,but I digress.
2. Ive allways used manufacturer kits as the motor factor "we can make up the colour" ones suck.

The manufacturer metallic ones have allways been 2 pots. Colour and lacquer. now not

nb Im sure paul is right that the original finish /or a respray on the water paints has a solvent lacquer.

It too must also be somewhat resistant to petrol , its gonna get spills on it right?.
How thin is this coating , and lets say I was to change to white spirits would this definitely be better than petrol taking into account it would be on the lacquer for a longer time and could need more abrasion? .
I dont buy petrol now cept for the lawnmower anyway.
nb diesel is useless for tar spots it dissolves em so slowly its more like tar spot lacquer.

dive bombing birds : clean and polish your car and it must have a "bird toilet" sign on it.

Lemme quote an article on water based paints.
The tester was in some english university.

He tested a Renault Clio, leaving bird droppings on the bonnet for 40 hours.

The lacquer layer was pitted and swollen, but the paint layer and bodywork was unaffected. Al Clarke, head of communications for the Society of Motor Manufacturers and Traders was very reassuring - as you would expect. He said that this extra protective lacquer coat is there to protect the body from bird lime.

Renault has said that it was already aware of the problem and was looking into "toughening up" the paint. Vauxhall is working with the paint industry to increase water-based paints' resistance to bird lime attack

Ive recently(yday) despotted,washed and polished the car, seems ok, but as you probly know a full coat of simoniz carnuba type stuff is labour intensive.

Is there any more definitive "water based paint finish? , no worries use acme super water based paint tarspot remover" or just carry on as allways?
Whatever method you use.
nb the quoted text was in an article about metallic finishes, but it wasnt stated what finish was on the clio.

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Last edited by coup; 11th March 2012 at 07:35 PM.
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