That says it all Mike "till cloudy in color". Keep mixing until CLEAR! I always mix for 1.5 minutes at least. ALSO, do not use more hardener and think it will be a harder finish...just stays tacky. Yes you can mix another batch and epoxy over the tacky one. I assume that you've guessed by now that I've been there done that...LOL
I'm a newbie also, about three or four months, but have learned volumes from the guys on this site.
Another little tip about epoxy...
First I must thank H'Islander for all of his input from wood selection to epoxy finish....
Someone was asking about bubbles in the epoxy, and I think H'Islander said to use a hair dryer to allow the bubbles to dissipate. He is exactly correct.
I've experimented a bit with the 2 ton epoxy and have found that it works REALLY WELL if heated. I use a hot water bath to loosen up the epoxy and hardener and then mix. It mixes beautifully, spreads very easily AND there are few if any bubbles. If there are any bubbles I hit it with an old hair dryer that I saved to dry my old boot foot waders. The waders are dead but the dryer is still drying! Another tip is to not mix more than you can use before it starts to set up a bit, usually about 10 â€“15 minutes. I do not do more than 2 plugs with the same brush. Remember the epoxy is setting up in the brush as you apply it. The flux brushes that the guys mentioned are the best things that I've ever used and I have also found a solvent that allows me to clean them. It's called xylene. Xylol may be the shelf name. If I'm adding any diamond dust to the epoxy I make sure that I have 2 SEALED jars of xylene, one for the dusted epoxy and one for the plain. What ever you do read the WARNINGS CAREFULLY. This stuff is DANGEROUS. If you think that vapors from paint are explosive, multiply that a bit and you've got one of the xylene dangers. You must work in a ventilated space or under an exhaust fan that IS SPARK FREE!