When painting a car (acrylic) you lay down a coat, wait say 10 minutes then lay down the next coat, etc.
If you take a break and come back the next day, can you continue to paint over the previous areas, or do you need to sand it back first ?
Obviously clean it first.
If you wait a week or two or four does it make any difference ?
IT's LIKE WATCHING DRUNK MONKEYS TRYING TO HUMP A FOOTBALL.
Finny,
If you leave acrylic well beyond the "flash off" period - you should let it dry and "block back" prior to re-coating.....
The thinners in acrylic are very strong and they will "fuse" into previous coats.... but - if you don't want problems - follow the instructions......
At this time of year - and I don't know what conditions you have had in your area - if it is too cool or humid - you may find problems within the layers of paint as the thinners evaporate (and this may take days).
I do not like to spray at this time of year - here in Vic - our "window" does not "open" until late October/early November - unless of course you have a booth or can guarantee your worksite to be warm and dry......
When re-coating, within the parameters of what I like to spray at - I usually leave the recommended flash off time before applying the next coat........ on very warm dry days - this can be as little as 5 minutes..... on cooler (and I don't mean cold) or more humid days - I leave at least 10 minutes....... I don't like to go beyond this and is probably one of the many reasons I do not spray when conditions are not suitable......
You run the risk of not "keying" in the next coat of paint if you allow it to dry and then re-coat...... I have found with some of my early work - that when I get a stone chip etc...... it is usually down to one of the "problem" coats......
hope this helps - it may not necessary be the best answer to your question...... but this is what I now do......
