Can this product be applied to painted surfaces.

I have used it over wood carvings painted with acrylic paints and have have excellent results in an outdoor evironment.

can i apply the oil based urethane over a water based paint to protect it?

You can but this is why you should use a water based poly over the oil poly Oil based poly has an amber hue, whereas water based poly is clear. An oil based polyurethane will continue to amber and darken over time, while water based poly will remain clear for the lifetime of the hardwood floor. ... Water based poly dries much faster, and several coats (up to 4) can be applied in one day. This explains why fritz the cat who did answer this question as well is why theirs yellowed

How is the viscocity out of the can, is it more like warm syrup or more like water...or somewhere in between? Thank you!

Maybe Slightly Thinner than warm Syrup, So probably between Warm Syrup & Water. A word of advice though, I had an extremely difficult time working with this product & had to sand and reapply many coats to get a satisfactory finish. It dries fast & if you run a brush over it after is has sat more than a minute it will create rough brush marks. Additionally if you apply more than a very thin layer it will crack similar to a crackle pattern. Unless you are putting this over a pure white background I would recommend that you use the standard "Crystal Clear" non-water based urethane. It has only a light yellow tint and is much easier to work with in my experience.

Can this product be applied over an exterior wood stain?

In fact it can, but being unfamiliar with the product, I purchase it thinking that it's use would result in a shine. I learned that "spar" must mean something other than gloss or high gloss. I then purchased the "Minwax Gloss aerosol which gave me the desired result, although several coats were required.

ASIN	B000Y4II3I
Best Sellers Rank	#89,413 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #412 in Finishes, Sealers & Stains
Brand	Minwax
Brand Name	Minwax
Compatible Material	Wood
Coverage	125 ft/quart
Customer Reviews	4.6 out of 5 stars 4,688 Reviews
Finish Types	Gloss
Finish type	Gloss
Global Trade Identification Number	00027426632004
Item Form	Liquid
Item Type Name	Minwax 63200444 Helmsman Spar Urethane, quart, Gloss
Item Weight	907 g
Item weight	907 g
Liquid Volume	32 Fluid Ounces
Liquid volume	32 Fluid Ounces
Manufacturer	Paint Sundries Solutions
Material	Plastic
Material Type	Plastic
Recommended Uses For Product	exterior
Recommended uses for product	exterior
UPC	027426632004
Unit Count	32 Milliliters

Minwax Helmsman Indoor/Outdoor Spar Urethane, Quart, Gloss

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