It could be too hot or too cold. It could be your surface is contaminated. If using oil based poly, then use natural bristle brush or wool to apply. Another reason is that the under coat may not be completely dry. Over brushing is also problematic.
After you spray something with a water based coating you should spray over it with polyurethane. This will make the bubbles not come up and the surface you have just sprayed stay smooth.
A coat of shellac can be placed over polyurethane. You should use de-waxed shellac if you plan on placing more polyurethane on in the future.
Polyurethane are recyclable, therefore, old, used or spent polyurethane should be sorted and recycled. we need to bear in mind that it takes more than 100years for polyurethane products to decay. Also, they are not biodegradable. Therefore, recycling is the way forward and in the case of some special polyurethane products such as Hospital wastes and the likes, the wastes should be treated before recycling. Olaoluwa Ogunfeyitimi
If you use a quality primer like Kilz or Bullseye, you should be OK.
I would use an exterior polyurethane. It is going to hold up better and be more flexible than a varnish. Polyurethane has taken over the varnish market--it's hard to find any other kind. There is a "spar polyurethane," which is what you should use on the item in question.
After you spray something with a water based coating you should spray over it with polyurethane. This will make the bubbles not come up and the surface you have just sprayed stay smooth.
it should
You should wait about 24 hours for polyurethane to dry between coats.
A coat of shellac can be placed over polyurethane. You should use de-waxed shellac if you plan on placing more polyurethane on in the future.
To achieve the desired finish, typically 2-3 coats of polyurethane should be applied.
Polyurethane are recyclable, therefore, old, used or spent polyurethane should be sorted and recycled. we need to bear in mind that it takes more than 100years for polyurethane products to decay. Also, they are not biodegradable. Therefore, recycling is the way forward and in the case of some special polyurethane products such as Hospital wastes and the likes, the wastes should be treated before recycling. Olaoluwa Ogunfeyitimi
Polyurethane will give a long lasting easy to apply finish. Use a water based polyurethane ans clean up will be much easier. You should get years of wear from a good polyurethane finish.
For applying polyurethane, it is recommended to use a high-quality synthetic bristle brush. These brushes are durable and provide a smooth finish when applying the polyurethane.
You should wait about 24 hours for polyurethane to dry before applying a second coat.
You should let polyurethane dry for about 24 hours before applying a second coat.
there are poly specific glues carried at most home improvement stores
For applying polyurethane, it is recommended to use a high-quality synthetic bristle brush. These brushes are durable and provide a smooth finish when applying the polyurethane.