Hammer, I don't want to rain on your parade, but Minwax Poly is for furniture and not intended for marine use. The only Minwax product for marine I know of is "Helmsman". Tried Helmsman and it didn't last. You will be refinishing or going the Starboard route next year. Starboard, Seaboard, Sikkens Cetol, are expensive products, but they do the job because marine use is what they were created for. I have pulled the V20 rod boxes, stern bilge hatch, cabin door for refinishing the teak and will post pictures when complete.
What I do to clean the teak is a solution of bleach and water and very little scrubbing. (unless the teak is really stained badly or someone put on a coat of varnish, paint, or poly which I use stripper to remove) The bleach and water turns the uncoated teak from gray to natural new teak color without really much work. By uncoated I mean bare wood that has maybe been only treated with teak oil. I like the look of teak oil, but don't like putting it on the wood about twice a year. The bleach and water will raise the wood grain. I let the cleaned teak dry. Then I sand the raised grain with a random orbital sander which is the most labor intensive part of the refinishing job. Then I apply 3 coats of Cetol Light, lightly sanding with a fine 3m pad between coats. I may need to clean and scuff up the Cetol finish in about 3 years to apply 1 coat of finish on top of the old finish. My boat is winterized and covered, but I will try to get a picture of my teak stern bilge hatch door that I just finished last weekend and post it. Took me about 3 hours cleaning, sanding, and coating not including drying time. I know this process works because this is about my 10th boat that had finished wood from mahogany, cedar, oak, teak, etc. somewhere on it and I have tried it all and made alot of mistakes!!!