[Corsa B 1993-2000] Paint misting/matting

[Sam_Sri]

Just painted my irmy aprons, 2 coats of primer and paint looked like this at first:



All fine, nice shine and drying nicely. Come back half an hour and the paints gone like this:



Turned matt and gone a far lighter colour. Time between primer and paint was just over 48h and had full dried.

Keeping a close eye on the front apron which is looking like this at the moment:



Can anyone give me ideas to what's gone wrong?

[tanktop]

That's down too temperature / climate mate. Used to get that till I bought a paint heater.

[Sam_Sri]

Thought it may be! Although I had a heater on, it still feels quite damp in the garage.

Any chance of bringing the paint back with a polish?

[tanktop]

Tbh I have never had luck trying that, as the damp gets into the paint it goes a matt colour so you can't normally polish it out.

Afraid you will have to flat it back and do it again, use some material on the concrete floor double it up though to try and reduce the cold from getting through and make if you can a plastic two sided wall (L shape) then sit the heater angled between the missing sides that should help the temp / climate enough.

More heaters the better tbh.

Sit them closer to the parts if you can.

[Williamcorsa]

[Vegas]

My first thought was temperature.

Soon as my stuff is rack dry I bring inside

[Sam_Sri]

Tbh I have never had luck trying that, as the damp gets into the paint it goes a matt colour so you can't normally polish it out.

Afraid you will have to flat it back and do it again, use some material on the concrete floor double it up though to try and reduce the cold from getting through and make if you can a plastic two sided wall (L shape) then sit the heater angled between the missing sides that should help the temp / climate enough.

More heaters the better tbh.

Sit them closer to the parts if you can.

I've got enough heaters so hopefully I can find a big bit of plastic! I'll grab some more paint and go for it again :thumbup:

Well I used 3 cans of the same Halfords Vauxhall Black, 2 of which were purchased a month ago and the 3rd yesterday. The 2 used for the rear turned out the same as the 1 used for the front.

I've used this paint a lot and its never gone like this before. It was about 14 degrees in the garage when I sprayed but it was also extremely damp which I didn't consider when I started. As tanktop suggested this could be the problem.

[tanktop]

I can see your points mate so don't think this is a negative too your post.

I have been painting for over 12 years and it only takes a little bit of damp or cold to make the paint react. Just by upping the heat by a few centigrades can help stop this happening.

You often find that using cheap paint sorts the problem but the paint will never harden so yes you will have a nice shiny panel but it will crack, chip, become damaged far easier in the elements of weather and life.

If you warm the panels first (maybe in the house) then make sure they go some to dry with similar temp / climate the paint will dry without discolour. If the temp / climate is largely different even a few c's the paint will react and dry smokey and flat.

[tanktop]

Another good way with small parts is preheat the oven turn it off and leave them in there for a little while this way it doesn't over dry them but helps harden the paint. Plastic in the oven is not so good as in my younger days I ended up with a lump of melted plastic and a telling off for the mess

Sam halfords paint is my favourite good colour match and a good paint for the money. The spray tips are good too and never seem to block or spit the paint. Can tell you that isn't the issue as I have never had a bad can from them for most of my spraying days.

[Sam_Sri]

Thanks tanktop ! (Forgot about this thread woops!)

Found the garage is so damp due to a broken gutter, fixed and getting a dehumidifier in there then I'll try again with warming parts and using heaters whilst painting!

Will it be okay to rub back the aprons and spray the colour on or do they need to be rubbed down fully and re primered?

[tanktop]

When this has happen to me in the past I have been able to flat it back and spray over the top, I used a finer paper which allows a small keying and a smooth surface for you to reapply the paint.

[Rob]

btw halfords paint is ****house. find a decent small paint supplier and use them.