Answers

I would recommend media blasting them with corn cob or crushed glass then Osborne brushing them before stain and clear coat.

Only by sanding, and it may still not be the original ”white” you are looking to achieve. All wood turns dark with time and sunlight.

Yes, the faded areas can be repaired. Call Mike at 866-670-3020 for help.

Even though they say the lumber was dried to a certain percent, it will draw moisture from the air when removed from kiln. You need to remove the oil based stain and get a good quality latex stain on it. Life Line is my choice. Stay away from the big… Read More »Archive-4986

Not sure, but it couldn’t hurt.

Nope

You can Osborne brush after blasting to help keep it lighter. When just blasted it takes in more stain which causes it to get darker.

The water stain is probably too deep in the wood fiber to remove completely. You will probably have to replace the sill with new lumber and start over. Call Dave at 800-564-2987 for the correct product to use.

Sanding walls will sometimes help, but not completely.

Depends on your area.