A friend at my regular job has some 8' high front doors on his house he wants me to blast. The doors face east and the sun faded them bad in 2 years his wife tried to put a new coat of poly over the bad coat and it turned white. Then she tried to use a pressure washer on it to remove it all which made it worse. I have soda, maxstrip, and fine crushed glass. If I use soda will it react with new stain or change the color? I know crushed glass will raise the grain because I have seen it on pine not sure about oak. I could get some walnut or corncob I have never used either of those. He lives on large property so dust and noise isn't an issue.