“Redwash” (redskin + whitewash) is similar to such terms as “greenwash” (about the “green” environmental movement) and “pinkwash” (about the “pink” LGBT movement). Something or someone can be “redwashed” in (made to seem Native American) or “redwashed” out (made to hide all ties to Native Americans). A definition was made in 2009:
 
“Redwashing is a term to describe the deception of the general public by government and industry in trying to cover up their theft of indigenous peoples lands, natural resources and cultural riches by pretending that they are acting in the best interests of the native peoples. The term is coined in analogy to greenwashing.”
   
A different type of “redwash” involves communist “red.”

 
Merriam-Webster Dictionary
whitewash
verb white·wash  \ˈhwīt-ˌwȯsh, ˈwīt-, -ˌwäsh\
: to make (something) whiter by painting it with whitewash
: to prevent people from learning the truth about (something bad, such as a dishonest, immoral, or illegal act or situation)
: to defeat (an opponent) easily by winning every game, point, etc.
 
Wiktionary: greenwash
Noun
greenwash ‎(plural greenwashes)
1. A false or misleading picture of environmental friendliness used to conceal or obscure damaging activities.
 
Wiktionary: pinkwash
Verb
pinkwash ‎(third-person singular simple present pinkwashes, present participle pinkwashing, simple past and past participle pinkwashed)
1. To cover in a coat of pink paint.
2. To promote consumer goods and services using support of breast cancer-related charities.
3. (LGBT) To tout the gay-friendliness of something in an attempt to downplay or soften aspects of it considered negative.
 
First Nations (February 5, 2009)
Redwashing
Redwashing is a term to describe the deception of the general public by government and industry in trying to cover up their theft of indigenous peoples lands, natural resources and cultural riches by pretending that they are acting in the best interests of the native peoples. The term is coined in analogy to greenwashing. Like in the case of greenwash, redwash occurs when time and money are spent on public relations gimmicks that make a pretence of acting ethically towards the indigenous nations of the New World, when in fact the opposite is done.
   
Twitter
لينة
‏@LinahAlsaafin
@JalalAK_jojo ohhh awesome..what would redwashing be? getting native americans to deliver their propaganda about how colonialism isn’t bad?
11:15 AM - 7 Mar 2012
 
Indian Country
‘Redwashing’ Panel Follows Academic Associations’ Boycott of Israel
Gale Courey Toensing
12/31/13
A group of scholars will travel to Lebanon in early January to participate in a panel discussion on “redwashing”—using indigenous Native Americans to cover up Israel’s ongoing illegal occupation of Palestinian land and violations of Palestinians’ human rights.
 
The panel, called “Redwashing: Israeli Claims to Indigeneity and the Political Role of Native Americans,” will take place during an international conference at the American University Beirut (AUB) Center for American Studies and Research (CASAR) January 6-9. The conference is called “Transnational American Studies.”
 
NPQ (Nonprofit Quarterly)
Dan Snyder Seeks Original Native American Art to Redwash Foundation
By RICK COHEN | August 11, 2014
(...)
That’s the chutzpah of Dan Snyder’s missionary approach to philanthropy, except that he isn’t offering food and assistance in exchange for white culture and religion. He simply wants Native Americans to take the charitable money in return, at a minimum, for turning a blind eye to the racially disparaging team name.