Spraying basecoat BETWEEN clear layers possible?
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Let’s say you just sprayed your first layer of clear, and then you notice you don’t have good (solvent)basecoat coverage in a particular spot, can you spray a little base over the (sticky) clear on that particular spot, and then go on with the final clear layers?
Can it be done? Yes depending on the paint system. I spray solvent so I cant answer for water. Is it advisable, absolutely not! If for some reason there was a situation when you needed to do it, there are many many factors that can turn a little trick into a disaster. The clear has to be quite flashed off to even consider it. Then after you apply your base carefully, you have to wait quite a while to re-clear. when you do reclear, it has to be light coat with a long flash between before a wet coat. If you don’t follow the steps metallics will blush (like old single stage) and solids will split and yellow. Some systems even have a ultra reduced clear formula for wet bed purposes so it obviously can be done but when it’s clear that’s reduced and activated as a top layer, it’s a whole different ballgame. My advice is bake the clear, scuff and reshoot. Don’t mess with trying a trick that in all honesty takes the same amount of time and unless you have done it several times before, I don’t advise it.
Dino is spot on and gave great advice :cheers I would like to add that basf and spies( among others) say you can use ready to spray clear that is over reduced by 100-150% as a wetbed for blending.If memory serves me right Im pretty sure you didn’t have to wait very long before adding base.I have been under the gun a few times dealing with a job that has to go and have spotted in base while clearing and it has worked fine.I would not suggest this at all,only in severe circumstances but you need to have experience to pull it off.I would not even dream of trying this with waterborne,it will kick you in the balls pronto :stoned
along with the other sound advise the addition of aroun 10 to 20% activator in you base will reduce the rick of a reaction ,you can of course leave the job till the next morning then rebase without flatting as the base will crosslink to the still relativly fresh clear
[quote=”ARTSPRAY” post=34721]along with the other sound advise the addition of aroun 10 to 20% activator in you base will reduce the rick of a reaction ,you can of course leave the job till the next morning then rebase without flatting as the base will crosslink to the still relativly fresh clear[/quote]
You are saying you can let clear air dry over night and apply base without scuffing?
It can absolutely be done. Not with waterbase though. If your spraying mettalic base make sure the clear is set up enough before you re-clear or the base will move.
yes and you can also reclear without scuffing ,which according to Sherwin Williams will also cure solvent pop issues without resorting to sanding back and rebasing the job [quote=”hating-painting” post=34727][quote=”ARTSPRAY” post=34721]along with the other sound advise the addition of aroun 10 to 20% activator in you base will reduce the rick of a reaction ,you can of course leave the job till the next morning then rebase without flatting as the base will crosslink to the still relativly fresh clear[/quote]
You are saying you can let clear air dry over night and apply base without scuffing?[/quote]
Check your TDS FIRST,not all clears are the same!! Usually you can reapply fresh clear over unsanded clear within 12-24hrs but most times some kind of sanding or repair is required.Your mileage will vary…..
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