@bob540,
Regarding your warped lp.... I would not recommend an iron. I think the best path forward with the least expense would be to get two pieces of plate glass. After cleaning the lp, put it between the glass pieces and place in your oven on the (very) lowest setting for 40 minutes to start with. Don't preheat. When times is up, (let it cool off in the oven), then take it out and check. After checking it's progress, adjust for a 10 minute longer time period. Repeat. If it hasn't become flatter, I'd increase the temp 10 degrees, then start over at 40 minutes. I think you can get the picture now. It's gonna be a trial and hopefully, no error process.Good luck!