first time painter problems
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Hi everyone, so I finally got to reclearing my roof and after setting up everything in my garage and sanding the roof I got too excited and started spraying without tacking the surface, afterward i also realised that i had mixed the clear with 2 part hardener and 1 part clear instead of 2 part clear and 1 part hardener. Obviously the job was terrible, dust specks everywhere and runs all over the place. So after that first job dried i redid it trying my best to keep it as clean as possible, it turned out ok the second time but there appear to be tiny bubbles in the paint only visible around the edges of a bright point of light, so I’m wondering if anyone knows what this could be. I can’t get pictures of it because i don’t have a decent camera which can pick up what I’m talking about.
Really appreciated if anyone could help.
Thanks!
without seeing it its tough to pinpoint exactly. but it sounds like you may have sanded through the clear and the solvents in the new paint wrinkled the base
in those sand through areasdid you strip off the messed up product? If you mixed the clear that badly the first time, it will not be a good foundation for later products. It must be removed.
As for the bubbles, it could be as ding said…it could also be some reaction from the previous clear (if it wasn’t removed). Is the paint a little thicker on the edge (like it was almost about to start to run)?
Hi Ben, I think I removed all of the previous clear coat, the first time i sanded it looked like there were a few spots which broke through the clear into the basecoat and when I sanded the second time there were more spots so i assume i had removed the badly mixed clear coat and more.
Hi Ding, I don’t think its the solvent reacting with the old basecoat as the little bumps are evenly distributed throughout the pint job and not just on a few spots
Ok so i googled around and the finish was similar to the picture below but the bumps are smaller and can only be seen when close to the panel and around a point of light. The guy who took the picture apparently had solvent pop as the problem but i followed the manufactures recommendations when spraying so I didn’t think that would be the same problem i’m having
http://hotrodders.com/forums/attachment.php?attachmentid=4408&stc=1
It sounds like solvent pop or some sort of contamination possibly?
Couldnt say for sure without pictures though.
You are spraying solvent base, correct? Which paint products are you using?5LEater, im using Wattyl Colourthane Clear
Did you re apply the basecoat? or just the clear.
Are these imperfections everywhere or just in certain areas?
Sounds like something not reacting right after you sprayed your clear again, how long did you let the job sit before you sanded it?the problem is evenly distributed throughout the paint, the first time i sprayed it when i mixed the paint wrong it had the same problem aswell among others and after letting the paint sit for 20 hours i sanded the roof again
[quote=”5LEater” post=20503]It sounds like solvent pop or some sort of contamination possibly?[/quote]
I agree sounds like contamination in your line what kind of pre filter do you have? What did you usr for a final wipe?
I only have a filter regulator after 20meters or so of airhose and a desiccant snake before the spray gun
hey guys, what kind of filters do you use for spraying at home?
Sound like solvent pop to me… You were probably spraying heavy and there wasn’t enough flash time between coats for the solvents to evaporate before you applied the next coat. It could also be the area in which you are spraying… Remember you have to have air flow for the evaporated solvents to escape, otherwise the heavy solvent in the air is trapped in your spray area (booth, garage, etc.). This can also cause your clearcoat to dieback (become dull). Damien
Hey Damien, do you have any suggestions for ventilating a garage? I only have 2 box fans to circulate the air in my garage, my garage is opened on one end and has a roller door on the other, if i open my roller door then i the air circulation increases significantly, do you think this will lead to more dust in my paint?
I would go with positive pressure type ventilation. Meaning, attach the filters to the back of the fan and blow the filtered air into the booth, garage, etc. This will eliminate the problem of sucking dirt and trash into your paint area. I would setup the two 20″x20″ fans about 3 to 4 feet off the ground on one end of your garage and make two openings each 10″x10″ on the other to keep some pressure in the spray area. This way also helps to keep the solvent mist from hitting the fan motors. Always remember spraying outside of a booth is dangerous so if the spray area becomes saturated with solvent give the fans some time to catch up. Good luck and have fun brother!
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