Hammering on epoxy

S

Steves69LS3

Just noticed something a little weird. I used to spray epoxy with my sata 4000 rp with a 1.4 tip. I would do light to medium coats and i would notice tiny craters in the finish.

I recently bought a sata 100b rp with a 1.6 tip and first used it on the front forks of the mini bike i am restoring spraying the same epoxy and this time i really hammered it on. I mean bad were talking nonstop spraying until i ran out of paint. Dont know why i did this but after the epoxy cured a little. The finish was smooth as glass no imperfections whatsoever.

So when it comes to spraying epoxy, does it come down to the type of gun that is used? Or did i just get lucky??
 
Depending what I feel like, I use 4 different guns from 1.4 to 2.2 for epoxy. I've seen craters with all of them at one time or another. It is almost always on the first coat. You can hammer it pretty good after the first coat and get away with it.
 
i think you got lucky. you want the epoxy to be highly atomized so you get wet thin coats. i have a 100b myself but with a 1.9. for anything i need to look good i cant use that gun. i need to spray with my lph400 with a 1.4.
 
I think you're right Jim. Probably just got lucky. But it just hit me that wow no blemishes lol
 
I need to borrow your rabbit's foot for a while! Recently I sprayed a type of sealer I've used hundreds of times in conditions I've experienced every year, and yet managed to solvent pop everywhere it got a little too heavy...
 
I took a pic but this phone app keeps giving me errors trying to load it
 
OK, we have a good shop who's compressor blew oil all in lines and we need to figure out now if we have a contaminated shop or still an air line problem, we know its oil or water so did some tests today to try and duplicate his problem, so we know what to look for.
All my testing when doing certain kinds are done on empty drums stored in breezeway waiting for pickup, these were drums used this morning and it was warmer inside..
I don't wash or sand drum just blow dust off with gun and wipe with shop towel.
Here is one wet coat, drums with oil added slick as glass, drum with water slick as glass with just a 3 inch section of super fine pinheads that showed up after 10 minutes and a couple pieces of dirt made by primer that popped up around 6-9 minutes.

Wall and air pressure at gun, all it is but as abused as I treated the epoxy, it still laid great, slick enough you could base right over it.

Drum 1 --oil vapors forced into.
Drum 2 -- two drops of 15w50 mobile 1 oil added .
Drum #3-- spit in cup.
 
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