Paint – what happened ?

Rickshaw · 3rd April 2023, 09:48

I have recently put one of my 75’s back on the road . Generally a pretty immaculate , 82k miles diesel saloon in White gold finish. This car has been SORN for about 2 years and ‘protected’ under one of those multilayer , breathable covers. That all sounds great BUT , once washed and polished I clearly see large areas of what is best described as cloudiness on the roof. This appears to be actually in the paint layer , NOT top lacquer. My local car paintworks have taken a good look at this , tried an electrical polisher on it , confirm it is in the underlying paint and are as mystified as me as to what process could have caused this deep change - a chemical change in the paint due to heat under a cover through summer ?. I do detect some stone scratch marks ( they got under the cover) but they are not as extensive as the cloud areas. Quite possibly , later this year , I may have the roof repainted ( £500 ‘ ish) BUT I wonder if anyone else has such an experience or has any idea how this might have occurred ? Is it just peculiar to Whitegold ? The paint shop chap is quite against car covers and I am beginning to wonder myself now – both the 75 I swapped the Gold car for and my MGTF are under covers right now . Usually I remove covers for a while every month to get rid of damp and even have a small heater placed in for a while.
Anyway – observations are welcome since I do not want these dull clouds on other roofs !

Matt_75 · 3rd April 2023, 10:33

Saw something similar on FB recently: https://www.facebook.com/groups/2421...8787267614342/

A detailer seemed to think it was moisture trapped under the clear coat. He recommended leaving it out in the sun to try and dry out.

Teflon · 3rd April 2023, 10:38

Sounds to me like the clear coat could be delaminating from the base coat, in which case, no amount of polishing will fix it sadly.

Cliff

coolguy · 3rd April 2023, 11:15

I have never used an outside cover having seen similar damage on a variety of different makes of car over the years.. It's harder work, but I try to give my outside fleet a regular polish or leather down when wet (too often!). Also inspect the clearcoat frequently - Jaguars are the worst for this - and touch in any chips with clear nail varnish polish to prevent any spread.

Keep us posted on any other info - like us, our finishes are getting older!

suzublu · 3rd April 2023, 11:31

This happened to mine, boot and roof. Had to have them resprayed 😎

Sent from my SM-A326B using Tapatalk

Rp61973 · 3rd April 2023, 11:50

Quote:

Originally Posted by suzublu

This happened to mine, boot and roof. Had to have them resprayed 😎

Sent from my SM-A326B using Tapatalk

I had a similar problem. It was the painter who used too coarse a grit to flat down the existing paintwork prior to respraying. After the new paint had settled, the scratches grinned through.

Nobby · 3rd April 2023, 17:06

its typically caused by moisture pooling and heating up under the cover particular in hot weather where the moisture boils off fading the paint. Can't be polished out I'm afraid - its a repaint job

bl52krz · 3rd April 2023, 18:29

I bought a cover to cover the Diesel while in the garage. It was under it for 2years. No problem. The same cover I have used to cover the 2.5V6 car for around three weeks outside, while next door had a new roof installed. I did notice that (condensation) water used to show under it after a while. I had kept the bumph that came with the cover, and when reading it again, noticed it said not to leave the cover on permanently as this could affect the paintwork. Now leave it uncovered and wash it down every now and again to get the dust off. Much safer.

Devilish · 4th April 2023, 07:46

Quote:

Originally Posted by suzublu

This happened to mine, boot and roof. Had to have them resprayed ��

Sent from my SM-A326B using Tapatalk

Same has happened to my drivers door Ronnie, it actually turned white, looks a right mess. Seems to me is has originated from the inside. at some point I will pop the card off and see what is what.

Rickshaw · 4th April 2023, 09:22

Well , I suspect Nobby has nailed it unfortunately ! Searching on the net I find too many cases of paint fade associated with cars under a cover and the same apparent cause – water / damp under the cover , hot sun , water reaches and changes the paint beneath the lacquer. Usually the only solution is a respray – although I have seen one suggestion that hot sun once again back on the uncovered roof might get the paint to return to it’s original colour ( not too sure about that!) . So , this trapped moisture argument looks very strong . Although I might , now have a cover on for the very worst of winter I will remove it from early spring – as things warm up - and never leave on through summer at all. I will , of course , get my whitegold diesel resprayed later this year too. Probably turn one of my car covers into a garden tent for the grand kids !

Hope other club members learn from this thread and thanks to all who contributed.

Good luck

3rd April 2023, 09:48	#1
Rickshaw Loves to post Rover 75 Tourer, 2 X75 Saloon , MGTF Sunstorm Join Date: Jan 2013 Location: Guildford Posts: 380 Thanks: 497 Thanked 172 Times in 93 Posts	Paint – what happened ? I have recently put one of my 75’s back on the road . Generally a pretty immaculate , 82k miles diesel saloon in White gold finish. This car has been SORN for about 2 years and ‘protected’ under one of those multilayer , breathable covers. That all sounds great BUT , once washed and polished I clearly see large areas of what is best described as cloudiness on the roof. This appears to be actually in the paint layer , NOT top lacquer. My local car paintworks have taken a good look at this , tried an electrical polisher on it , confirm it is in the underlying paint and are as mystified as me as to what process could have caused this deep change - a chemical change in the paint due to heat under a cover through summer ?. I do detect some stone scratch marks ( they got under the cover) but they are not as extensive as the cloud areas. Quite possibly , later this year , I may have the roof repainted ( £500 ‘ ish) BUT I wonder if anyone else has such an experience or has any idea how this might have occurred ? Is it just peculiar to Whitegold ? The paint shop chap is quite against car covers and I am beginning to wonder myself now – both the 75 I swapped the Gold car for and my MGTF are under covers right now . Usually I remove covers for a while every month to get rid of damp and even have a small heater placed in for a while. Anyway – observations are welcome since I do not want these dull clouds on other roofs !

3rd April 2023, 10:33	#2
Matt_75 Gets stuck in 75 Saloon Join Date: Apr 2022 Location: North Somerset Posts: 605 Thanks: 13 Thanked 20 Times in 8 Posts	Saw something similar on FB recently: https://www.facebook.com/groups/2421...8787267614342/ A detailer seemed to think it was moisture trapped under the clear coat. He recommended leaving it out in the sun to try and dry out. __________________ Matt 2001 Rover 75 Connoisseur SE 2.5 (BRG) 1999 Rover 75 Club 2.5 (Dorchester Red) 1973 Triumph Dolomite (Honeysuckle)

3rd April 2023, 10:38	#3
Teflon This is my second home Lagoon 2.0 V6 75 Conn SE Saloon Join Date: Nov 2006 Location: Chertsey Posts: 5,221 Thanks: 2,825 Thanked 2,920 Times in 1,570 Posts	Sounds to me like the clear coat could be delaminating from the base coat, in which case, no amount of polishing will fix it sadly. Cliff __________________ No. 4 of 6

3rd April 2023, 17:06	#7
Nobby Aged to perfection! Rover 75 Conn SE Tourer Join Date: Nov 2006 Location: Princes Risborough Posts: 645 Thanks: 405 Thanked 423 Times in 226 Posts	its typically caused by moisture pooling and heating up under the cover particular in hot weather where the moisture boils off fading the paint. Can't be polished out I'm afraid - its a repaint job __________________ Nobby....... Sometimes I talk to myself, Then we both LAUGH!

3rd April 2023, 18:29	#8
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,444 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	I bought a cover to cover the Diesel while in the garage. It was under it for 2years. No problem. The same cover I have used to cover the 2.5V6 car for around three weeks outside, while next door had a new roof installed. I did notice that (condensation) water used to show under it after a while. I had kept the bumph that came with the cover, and when reading it again, noticed it said not to leave the cover on permanently as this could affect the paintwork. Now leave it uncovered and wash it down every now and again to get the dust off. Much safer. __________________ Great Barr, Birmingham.

3rd April 2023, 11:15	#4
coolguy Coolguy Rover 75 CDT Tourer Auto, Rover 75 2.0 Connoisseur Auto, MG ZT 2.5 Auto and MG ZT Cdti Auto (Monogra Join Date: Nov 2009 Location: Finedon Posts: 1,906 Thanks: 933 Thanked 638 Times in 430 Posts	I have never used an outside cover having seen similar damage on a variety of different makes of car over the years.. It's harder work, but I try to give my outside fleet a regular polish or leather down when wet (too often!). Also inspect the clearcoat frequently - Jaguars are the worst for this - and touch in any chips with clear nail varnish polish to prevent any spread. Keep us posted on any other info - like us, our finishes are getting older!

3rd April 2023, 11:31	#5
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,976 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	This happened to mine, boot and roof. Had to have them resprayed 😎 Sent from my SM-A326B using Tapatalk

4th April 2023, 09:22	#10
Rickshaw Loves to post Rover 75 Tourer, 2 X75 Saloon , MGTF Sunstorm Join Date: Jan 2013 Location: Guildford Posts: 380 Thanks: 497 Thanked 172 Times in 93 Posts	Think that's got it covered !! Well , I suspect Nobby has nailed it unfortunately ! Searching on the net I find too many cases of paint fade associated with cars under a cover and the same apparent cause – water / damp under the cover , hot sun , water reaches and changes the paint beneath the lacquer. Usually the only solution is a respray – although I have seen one suggestion that hot sun once again back on the uncovered roof might get the paint to return to it’s original colour ( not too sure about that!) . So , this trapped moisture argument looks very strong . Although I might , now have a cover on for the very worst of winter I will remove it from early spring – as things warm up - and never leave on through summer at all. I will , of course , get my whitegold diesel resprayed later this year too. Probably turn one of my car covers into a garden tent for the grand kids ! Hope other club members learn from this thread and thanks to all who contributed. Good luck