epoxy arg !!!!!!!!!!!!!!!!!!!

P

perky

i have not had fisheyes in 25 years. this epoxy is pissing me off! compressor drained, 3 drops on lines, 2 water seperators, filter on the gun. spi epoxy under , 2k primer over that. spi solvent wax and grease remover waited an hour to dry. fisheyes the size of a half dollar all over hell. i sprayed black over fresh sand blasted metal and it fisheyed. i sanded out some 2k and put another coat on and it had some fisheyes! you can just about spray 2k on grease and it dont fisheye. different rags ,paper towels, different wax and grease remover, this sucks. :mad:i gotta go sand out my fisheyes. any help ? i give up
 
it aint the epoxy. my guess is your contaminates from your compressor has finally made it to your booth. unless you have some airborne things going on around you. i put a new hose in my booth every year . and i dont paint much anymore.
 
so you think its my hose? i have got a eaton v 4 2 stage 80 compressor that runs at pretty low speed with not alot of use on it. i had a sharpe 606 water seporater and just added a qc3 to that over the winter, gti gun with a new filter at the gun today. it aint surface contamination. tryed high pressureat the gun, low pressure, 2 different guns. the heavier i lay it on the bigger the fisheyes. i have been using this all winter trying to get it figured out. sometimes i get none but most the time i get spots the size of a half dollar. i just sprayed the whole car with white and am just pissed right now . i just thiought this stuff was a little finnicky but i'm at a loss. i will go change my hose, i have others but i don't think thats it.
 
If you are so sure it not the airlines then there are some more things that will cause this.
OTHER THEN contamination! But we won't consider this.

Using a primer tip 1.7, 1.8 and not enough air pressure.
Air pressure at wall is not at least 120+ with a 25' hose.
Air pressure at gun is to low, start increasing 3 lbs at a time but it will not do a thing
if the wall regulator is setting at 80lbs. Increase wall as high as can go.

The only other time I have EVER heard of fish-eyes that big in the epoxy was a a guy 6 months ago doing an Eleanor and he had mixed 700 waterborne in the epoxy instead of activator.

Also you said it was spotty, that is hose every time if you are sure it is not spot contamination.
 
i have never had a problem with the epoxy . i have fought contaminated air lines several times though. depends on how much use really. when i had the van business we ran wide open 6 days a week. we had to replace the air lines twice a year. filters help but we just finally got enough oil through them to start causing problems. ended up spending a fortune for filters at the compressor. one of my compressors was new but put out a bunch of oil. had to replace it . we did learn to use leaf blowers instead of the air hose to blow out the shop. the more volume the further the oil would travel. hope it helps.
keep throwing it out here sooner or later someone always turns a bulb on . :D
 
1/2 inch hose, high flow fittings,devillibiss finishline 1.5 tip, devillibiss gti 1.3 tip, 120 at the wall, 19, 23, 25, 30 pounds at the gun. tried different pressures. had black and white epoxy, both did it. i changed the hose and sprayed the back side of a piece i never touched with wax and grease remover and no fisheyes. maybe it was the hose. it's the only thing i haven't changed but i dont know how it got past the gun filter. i'll have to sand out the eyes and spray some more and see what happens. i just get pissed when i keep farting around with the same problem and get nowhere. the only thing i hate worse than doing stuff once is doing it twice. the only thing thats been in the shop in the last 2 months has been primer dust.
 
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stuff don't sand to good . base over it and sand out the base ay ?
 
i dont even use any 2k primer. all i use is epoxy for priming. i wet sand everything . i do not need any more dust in my lungs.
those filter balls restrict air flow and are toast in 5-10 min of spraying . i stopped using them years ago.

now you need to determine what contaminated your hose. you may have to back flush your lines if they are copper or steel.
 
sands good when cured i use 120-320. i dont use primer just epoxy. perhaps w&g remover not wiped all the way off? the only time ive had epoxy fisheye is when the metal is too cold! 70 or above for me. do not compound your problem by spraying base!
 
funny you say that about the gun filter because i have not used them in years either but i was having problems so i put one on. wax and grease remover with another person 1 foot behind me. believe me its off. it's about 82 degrees in the shop. cooked her up with infrared,wet sanded ok this time. changed my air hose ,dropped air pressure back to 23 at the gun and not one fisheye this time. i oiled my air grinder about a month ago, maybe some got in the hose ? my compressor does not use 1 drop of oil and that air hose was only 2 years old but maybe that was it . i dunno? excuse the rant. carry on.
 
i know this sounds nuts but new hoses are cheap compared to rework. i replace mine at least once a yer and i only do one or two a year. my shop is plumbed with pvc so it was easy to cut out and replace. this summer i am going to re-plumb the shop with copper. don't like the pvc at the higher pressure. but i am going to plumb it with ports i can remove to back flush the system. you wont notice much oil usage. takes very little to make oil vapor.
 
i have no problem buying a hose,i'd buy 10 hoses if it fixed the problem. it just never occurred to me thats what the problem would be. never had that happen before so never thought of it. it just started when i started using this spi epoxy so with everything there is a small learning curve i just thought this stuff was picky. i used to use mar hyde 2k primer and stuck with it cause i always had good luck with it and it sanded pretty good. gun filter is in the garbage can now. this is my first go around with the pro spray too. i used dbc all the time. i like it so far. i just can't pay ppg prices anymore, there crazy. i tried the nason clear but that stays way too soft for me. i tried hok flow clear and got some funny little pops in it. never had solvent pop in my life till that. i'll try this uv clear on this job and see how it go's.
 
in 42 years if it could be screwed up i have done it. i've pushed the envelope so many times my butt is raw from getting bit. i'm down to spi epoxy , single stage concept and uv clear. that is all that is involved with the job. will try prospray ss soon . good luck with it. be a good thing if it's just the hose.
 
There's contamination on the parts, not the hose I would bet money on it. It's not a product problem but you need to figure out what is getting on the parts before you pull the trigger. No fisheyes in the past 25 years....? SPI epoxy might be more prone to fisheying over contamination than other products but it doesn't change the fact that there's contamination there.
 
crashtech;19198 said:
I think it's just too wet at too low of pressure.
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Latley it seems that every time i spray something too wet i get what you are talking about here. It looks like BAD contamination but it is always somewhere i just sprayed too heavy.
 
perky;19195 said:
View attachment 1106View attachment 1107View attachment 1108View attachment 1109View attachment 1110View attachment 1111 stuff don't sand to good . base over it and sand out the base ay ?
Click to expand...

It looks like the problem areas are low areas or corners, both places that are easy to mess up when wiping down.

looking at the cowl, did you wipe it from side to side or from front to back, my guess is side to side and the cloth didnt contact the panel after going over the ridge at the center.
Same with the fender, the low portion between the ridge and the center of the panel is where it fish eyed and is the low spot in that area.

Either way, seems like a lot of fish eye in an area, like the panel was wiped with an oily cloth or something else?

SPI epoxy is super sanding, you got something all messed up, did you use epoxy activator or clear activator in it?
 
i may have exagerated a little on the 25 years but it has been a long time since i've seen a fisheye. i had this problem with the epoxy for awhile. i was extremely careful wiping this down because i been having a problem. what you are looking at is the top of a fender and the front header panel. i used 2 different rags to check if it was a cloth problem . it was no different. i wiped it down, walked out the door for 1 hour, came back sprayed. nothing on the panels. it was still a little tacky to sand so i cooked it for 15 minutes, let it cool,then it sanded fine. i changed the hose, put one more coat of epoxy on and have since put on 3 coats of white base without 1 fisheye . i changed nothing but the hose and they seem to be gone. thank you shine and barry.
 
perky;19210 said:
i may have exagerated a little on the 25 years but it has been a long time since i've seen a fisheye. i had this problem with the epoxy for awhile. i was extremely careful wiping this down because i been having a problem. what you are looking at is the top of a fender and the front header panel. i used 2 different rags to check if it was a cloth problem . it was no different. i wiped it down, walked out the door for 1 hour, came back sprayed. nothing on the panels. it was still a little tacky to sand so i cooked it for 15 minutes, let it cool,then it sanded fine. i changed the hose, put one more coat of epoxy on and have since put on 3 coats of white base without 1 fisheye . i changed nothing but the hose and they seem to be gone. thank you shine and barry.
Click to expand...

Glad you solved the problem, now you have to post pictures when it is finished :cool:
 
Usually if the contamination is in a hose and becomes an air problem there will be contamination spread out over the complete panel, strange how it was only in concentrated areas. Glad you got it figured out!
 
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