Antique Marklin train set , minor service tips operations Made in Germany

bought a huge Marklin train set on Ebay ,, just setting part of it up ..Use liquid wrench or rust inhibitor to bring back rusted worn tracks n locomotives to service. just a small 6x3 track set up..
i buy Porsche Speedsters, coupes 911s Alfa Romeos , Mercedes Benz Pontons, Zundapp BMW Harley Davidson Indian NSU OSU motorcycles bikes parts baskets...ww1 ww2 German Militaria etc [e-mail]