The runs are in the top coat that I just put on Just getting used to new gun.... hence the runs.If you're getting runs in basecoat you're spraying it too wet which is the cause of your reactions,as I said earlier.
Solvent based colour coat is what went wrong. Managed to "save" it this morning using the "dust" method (man very thin coats). Applied 2K lacquer today, but got a few runs.Hang on,you were using basecoat earlier,now you're saying topcoat.
What exactly are you using ?
Edit i missread when you said solvent based colour coat
So you're using solid 2k ?
That changes things because I've never seen 2k go like that,ever.Fish eyes galore yes,but never like that.
You will need to let it dry overnight or dry it with heat befor attacking the runs
my thinking also ,too many coats of different substrates , definatly a chemical reaction ie shrinkage etc, one answer ,strip it back to bare, fill dents , etch prime , 2k primer flatten , 2k again , flatten ,ready for paint. works every time , no problems, whats more if yours is not oven baked ,over 2 or so years it will all sink back because of the different layers and will show up every different feathered edge, speaking from experience seen it all too often ,looks good when done but over time will deteriate. sorry.What topcoat are you using ?
Looks like shrinkage to me.....and given the amount of different layers you've used I'm not surprised.
Epoxy,primer,filler, epoxy,primer.....where did you learn that from ?
You dont put primer between your epoxy and filler for a starters and your 2nd application of epoxy.....if you really think you need it.....should just be a thin sealer coat after you've finished your final primer flatting and before topcoating.
Looks to me like you've got to much product on and too many different layers and some of it has shrunk when you've sprayed your topcoat
Also what is this silicone remover you are using ?
Good old degreaser/panel wipe is all you need,just don't let it evaporate by itself,wipe it off as you go
I think you're confusing with your terminology.
Basecoat.....solvent or water.....followed by 2k clear.
OR
Solid 2k
That's how they are usually described.
So,you got reaction in your basecoat and runs in your clear.
Again, I go back to what i said earlier,that's not silicon.
Looking at your finish i think you need to practice your technique, I'm guessing your pressure is too low,it looks extremely heavy
Have you ever block sanded epoxy primer ?
It's incredibly difficult plus it doesn't have the filling capabilities of 2k primer.
Given that body filler is porous too perhaps we should all stop using that too
I'm with Daz2012 on this and use epoxy then a 2k primer.
I find it gives much better results and if you look at any car from the 80s on that's how they are done.
You can sand epoxy but if you are trying to remove material to get a perfectly flat or contoured surface 2k is the way to go. The epoxy is harder so you tend to follow the shape laid down by the paint and not remove material from the high spots, unless you use really coarse paper which sort of negates the point of what you are trying to achieve.
With fiberglass it might be different with osmosis and all but not something I know much about.
agreement with both above, i stick with what i know works and havnt had any problems with or people coming back unhappy , as said before depends on what method you use for drying /curing materials and if its worked for 30 years i think yous will agree.
That particular product is primarily for commercial/ industrial use and the finest grade for sanding they recommend is 320 grit,way to coarse to be spraying basecoat over