Looking at some of these caps I see for instance a yellow .5mfd says ETR MET and the value of 504K630V. The "ETR" must be the brand. The "MET" is for Metalized Polyester Film i guess.
ETR is ETR electronics, LTD
Subsidiaries:
1. Sinhua Electronics (Shanghai) Co., Ltd.
2. ETR Electronics (Singapore) Co., Ltd.
3. ETR Electronics (India) Co., Ltd.
4. ETR Electronics (Hong Kong) Co., Ltd.
Product Items:
1. Polyester Film Capacitor
2. Polypropylene Film Capacitor
3. Metalized Polyester Film Capacitor
4. Metalized Polypropylene Film Capacitor
5. LEDs & LED Displays
6. Tantalum Capacitors
A Electrolytic has a brand name on it of MIEC and states the value in MFD.
Here's what I found:
Ling In Electronics Co., Ltd. - Aluminum Electrolytic Capacitor, Electrolytic Capacitor, Middle and High Voltage Capacitor, Car Capacitor.
So.. what am I gonna use? U bet.. You guessed it!