Clear coat gone cloudy
Posted 03 June 2008 - 01:02 PM
After spraying the car, there is a line on the roof and several on the bonnet where the clear coat has gone cloudy and I cannot get it out. I've just rubbed the whole car back with 1200 and buffed it but it did not get rid of these lines. Am I not sanding enough or using the wrong sandpaper? Any ideas?
I tried to get some good photos to show the lines, but its raining and theres not much light etc etc and you cant see the full extent of the lines but they are there!
I'd like to know how it happened and also how to get rid of it as it's really getting on my nerves!
Any ideas or suggestions would be great and much appreciated!
Posted 03 June 2008 - 01:27 PM
I had something like that happen when I sprayed clear and the responses from my post Clear coat gone milky suggested my problem was the time of day I sprayed and the humidity level at the time.
I am however no expert on the topic.
When I re-did my clear coat I got streaks like you have but this was different from my previous effort. It ended up being clear coat overspray and lucky all I had to do was let the clear flash off and then I wiped the panel with a tack cloth to remove the overspray. I had to do this after each coat of clear.
The end result turned out OK though.
The painting experts will be able to give a better diagnosis than me though.
Posted 03 June 2008 - 01:31 PM
Posted 03 June 2008 - 06:19 PM
You need good weather to paint, that or a controlled environment (booth).
Posted 03 June 2008 - 06:35 PM
Posted 03 June 2008 - 06:50 PM
If it were moisture, I'd expect it to be clouded more evenly.
Do you paint using a water trap? A water trap mounted on the compressor is nearly as good as not using a water trap at all.
Posted 03 June 2008 - 06:53 PM
Posted 03 June 2008 - 09:26 PM
I'd suggest a good rub down with 800-1000 wet so the surface is flat, 2 coats of your Blue Basecoat, then reapplication of your Clear.
When you apply the clear next time, Open your fan setting some more, open the fluid nozzle some more, Use more Overlap than you did last time and lay it on really wet, Acrylic is really hard to get a run in particularly on a bonnet so don't be scared.
Most importantly I'd also suggest going for a better quality thinners too, theres a lot of dry spray there which means the paint is drying in the air before its hitting the panel. Some Retarder Thinners will help slow down the drying time for the paint also but use sparingly.
If your painting it again and experience this dryspray you can always give it a quick coat of straight thinners to try and melt it into the paint surface while the paint is still drying.
Another tip for bonnets/roofs, Start on one side of the panel and work your way across, particularly with Acrylic Lacquer if you start in the middle of the panel and work outwards and then come back in the middle when you do the other side you will get some dryspray there.
Don't get discouraged, no one is having a go at you, it's great to see a young bloke giving it a go, have another crack and it will work out fine!!
Posted 03 June 2008 - 10:26 PM
Posted 04 June 2008 - 09:38 AM
Posted 04 June 2008 - 05:07 PM
Posted 04 June 2008 - 05:49 PM
Posted 04 June 2008 - 08:08 PM
I beg to differ Pete. hehehe
Acrylic is really hard to get a run in
But then I am a mere novice in these matters.
Take Pete's advice as it will most definitely steer you in the right direction.
It hasn't been said, but the base coat was fine prior to the clear being blown over.
Posted 06 June 2008 - 08:13 AM
Posted 05 July 2008 - 06:51 PM
Alot of learner painters will do this because it can be difficult to hold the gun over horizontally level.
Thats my theory and as I am well and truley over it, im sticking to it.
start at one side working in to the middle and then go to the other side of the car and start at the middle and work back towards yourself. with metallics after you have got the coverage that you want, it also helps to do even dust coats over the car from a bit further away to get all the metallic excited, it will look lovely and cover up areas where (if) you have the metallic uneven for any reason.
Make sure its not cold outside when you spray as the acrylic paints will go milky or cloudy from the cold, also larger areas than your stripes, this is with straight colours or clear coats.
Always make sure your gun is clean and spraying a nice pattern and make sure the breather hole in the lid is clear and not blocked, it also helps not to have a full gun doing boot bonnets and the roof, make sure if your lid moves that you set it with the breather hole closest to the handle of the gun so when your spraying the bonnet the breather is up at the top of the lid to prevent dripping from the hole.
Keep practicing and enjoy it because you will get there and get so much self satisfaction for what you have done
Posted 08 July 2008 - 10:28 PM
if it was painted in 2 pak then it looks like it will be in the basecoat where you have had dry spray usually on to hot of a day
just post up what type of paint you used and what type of day it was and i will figure out cause and rectification for you
Posted 09 July 2008 - 09:09 PM
Edited by Zeke_LJ, 09 July 2008 - 09:10 PM.
Posted 09 July 2008 - 10:14 PM
Posted 11 July 2008 - 09:41 PM
Posted 11 July 2008 - 10:34 PM
Posted 12 July 2008 - 12:00 AM
yeah cool zeke, i have some buffing to do in august
Ill return that buffer in a couple of weeks gstar
Posted 12 July 2008 - 07:27 PM
I've been meaning to message you I lost all my numbers (again) though.
I did the whole car once over and some bits came up good just like that section you did but some bits are still crappy and Ive been waiting for a chance to redo them but I've just started working
I can bring it back whenever you want though let me know!
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