Barry Not really a situation I encounter so I'm trying to understand exactly. I feel like I know why but perhaps you or Jim can verify. So re-coat is unlimited if it does not leave the booth, but if it does is the issue the contamination that would get on the basecoat by it being outside of the clean environment? If that is the case what about going back over it with W&G like 700? Yes, no maybe? With what you said being the case it would seem like to me if you had to pull something out of the booth putting a coat of intercoat on it before pulling it out would be helpful. Yes, no??
If pulled out of booth the base should always be wet-sanded, cleaned with only a solvent type cleaner and re-coated.
Never use 700 on a base as it can eat most bases alive.
Depending on structure of base, I like to avoid cleaning if possible although I have done it, I let it set overnight before next application, overkill Yes but I have had calls where the cleaning of base was the cause of an issue. Not a lot but a few calls.
Heavy polyester type bases i would clear within 24 hours, such as Wanda, Diamont although i have tested Wanda 14 days later then cleared (setting in breezeway) and then let set a week and the adhesion tester showed no weakness.
A further note hear is all the Restoration shops I talk to everyday unless its a cut in job all let the base set until the next day to clear with no exceptions or consideration as to brand of base.
Another consideration is clear you are using, solids equal adhesion, so if using a 39% solid clear and a lot are less, I'd think twice about how long the base sets.
Like everything else in this business there are a lot of other variables to consider that is why I will give so many different times on re-coating epoxy
as i know what questions to ask when I get the call.
