has anyone over used a small sand blaster before ? are they any good for the redoing of my interior all doors and seat box etc r out could I use one to take paint and find what needs filling on inside of doors and foot wells and seat box etx (series 3) looked at a Sealy 22kg one

I have one and would not like to do a whole door frame,fine for small jobs if you do not mind grit everywhere including in your underpants.