Leave the stripper for 30 minutes then scrape away following the wood grain.
Fixing a blotchy stained floor.
Use a polisher on the main area of the floor using 80 grit screens followed by 100 grit screen to remove scratches.
Then stain the entire board.
If the surface is very blotchy you ll have to remove the stain by stripping sanding or both and start over.
If the surface that you have is very blotchy you need to make sure that you will remove the stain first by stripping it.
However applying multiple coats of stain isn t always the best way to achieve a deeper color.
What you are trying to do is remove as much of the stain possible.
Apply a wash coat of shellac and then the statement.
This time apply a washcoat of shellac and then the stain.
Scrub out the streaks then reapply the stain liberally.
Clean off all dust and wet the floor with warm water.
Still wet with a scotch brite pad and mineral spirits or naptha.
One sure way to fix a blotchy stain is to sand it off and start over.
To apply liquid stripper spread it around evenly with a chip brush to create a nice thick layer.
Wipe off the excess with a rag immediately.
You can also choose to sand it and even do both and just start over.
A few dark spots on the floor can be fixed using lightening techniques but if your entire floor is blotchy and uneven consider a whole floor approach.
This will also even out the irregularities that may have occurred when sanding.
If you need a darker glaze to cover up the blotchy areas use just the tip of a dry natural bristle brush to distribute the stain instead of wiping it off until it s an even color.
If you re using an oil based stain scrub the surface while it s.
Start by making a test board with your chosen sealer concentration.
Let it dry and add a second layer of stain to all but one section.
Apply pre stain wood conditioner which makes the porosity of the whole piece more uniform.
Wipe the brush off frequently as you work.
First strip as much of the color as possible.
If i do have some spots that donot stain just sand them again and reapply the stain.
Also with plywood justmake sure you do not over sand and get into the glue from where the plies areput together this will leave the same blotchy finish.
If you do have a blotching that is not too severe then you can try and glaze it.
If you remove too much restain that area and start over.
Then the only answer isto use polyshades and just paint on the stain with the poly.
Depending on the size of the problem area you can sand it down small or use a liquid paint stripper large.
For water based stains use a lacquer thinner.
The next step is critical.