Weird problem
- This topic has 7 replies, 6 voices, and was last updated 14 years, 5 months ago by .
- Posts
Hi,
Since Friday, i down a hood to bare metal, sanding to 320. After that, i wash it with wax and grease remover . Next day, i spray one full wet coat of Ful-poxy (yes i wait my induction period before). After one hour (flash time), i spray 3 med coats of 2K urethane of Nason 421-19. Nice clean job.
I wait 3 hours for dry. I sand it to 600 wet. I wash it with clean water, dry. After 1 hour, i wash it with final wipe solvent. Same method like many job. No problem for now.
I spray med coat of basecoat and now, a lot of fisheyes appear. What wrong ? :huh:
thanks for your comments.
could b a lot of things. moisture in the air lines. something on your clotes. something floating in the air. it’s hard to say. if you have some fisheye eliminator you can use it. but if you use it in the base you’ll have to use it in the clear. you can wait 15 mins. and lightly sand the base with 600 and rebase start with a light coat.
If ya can take a pic it would help.Looking to see how consistent they are or are they in groups yadayada.
Tough to pinpoint the source of fisheyes over the net. could be lots of things as stated above… check everything. someone nearby could have sprayed something in the air that caused it.
On a side note. no need to take bare metal to 320. 180 is plenty if your gonna seal and paint. and if your not using a grinder for your prep and you put 3 coats of 2k on like you did you can even get away with 80 grit. the sand scratches in metal are not as deep as ones in paint 😉Ok thanks for hint. Maybe is moisture in my line. I see more water in my trap today. The filter just before the gun it is good for that? I have not a big system for filter and trap moisture.
As mentioned lots of things can cause fisheyes. Are you using rags that could be contaminated rather than clean lint free wipes? If you are wearing coveralls that have been washed/dried with fabric softener this can sometimes cause fisheyes. Airlines or oil from the compressor (do you have a good filtration system)?
There are hundreds of possible causes.
What wax and grease remover are you using? Not all are created equally.
Hi again,
Following this problem, i’m definitely recoat. I have too much fisheye because of moisture in my line. I resolved it now.
Should i remove completly my basecoat? It does not yet seem dry when i try to sand.After new recoat
2K surface Primer -> basecoat -> Clear
thanks.
hi, i had that happen to me once, and it never happend before or after, but it happened because i used wax and grease remover, then glass cleaner waited a few mins and tacked. somehow the solvents on the panel did not flash enough and it loosened the material off the tack rag which caused streaks and tremendous fish eye. and to top it all off, it was a blend panel that did it. not only did i have to end up blending the rest of the side because of it but i had to resand with the da and seal it before i put base on it again. the moral of the story is to let the cleaning solvents flash way long before you even think about tacking or spraying.
- You must be logged in to reply to this topic.