The "whitewash" sounds to me like pickling although pickling is usually put on on top of a color coat. You can get pickling at any large paint store. It is a thin liquid with a whitish material in it. Ordinarily, you spray it on, but I have brushed it successfully.
I built Southwestern style furniture for our den and sprayed pickling over a darkish stain to get the antique look I wanted. The pickling I used was left over from when our house was built; it was used on the kitched cabinets.
John W. Irwin
2018 Interstate GT, "Sabre-Dog V"